Spaces:
Sleeping
Sleeping
added app file
Browse files- app.py +149 -0
- dictionary.json +899 -0
- models/BERT_LSTM_CRF.py +78 -0
- models/__init__.py +1 -0
- models/layers/CRF.py +353 -0
- models/layers/__init__.py +1 -0
- models/layers/__pycache__/CRF.cpython-310.pyc +0 -0
- models/layers/__pycache__/__init__.cpython-310.pyc +0 -0
app.py
ADDED
@@ -0,0 +1,149 @@
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1 |
+
import gradio as gr
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import torch
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import json
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from nltk.corpus import wordnet
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from transformers import AutoConfig, AutoTokenizer
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from models import BERTLstmCRF
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from huggingface_hub import hf_hub_download
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checkpoint = "gundruke/bert-lstm-crf-absa"
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config = AutoConfig.from_pretrained(checkpoint)
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id2label = config.id2label
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tokenizer = AutoTokenizer.from_pretrained("gundruke/bert-lstm-crf-absa")
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model = BERTLstmCRF(config)
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repo = "gundruke/bert-lstm-crf-absa"
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filename = "pytorch_model.bin"
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model.load_state_dict(torch.load(hf_hub_download(repo_id=repo, filename=filename),
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map_location=torch.device('cpu')))
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def tokenize_text(text):
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tokens = tokenizer.tokenize(text)
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tokenized_text = tokenizer(text)
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return tokens, tokenized_text
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def convert_to_multilabel(label_list):
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multilabel = []
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if "B-POS" in label_list or "I-POS" in label_list:
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multilabel.append("Positive")
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if "B-NEG" in label_list or "I-NEG" in label_list:
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multilabel.append("Negative")
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if "B-NEU" in label_list or "I-NEU" in label_list:
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multilabel.append("Neutral")
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return " and ".join(multilabel)
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def classify_word(word, dictionary):
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synsets = wordnet.synsets(word)
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if synsets:
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hypernyms = synsets[0].hypernyms() # Get the hypernym of the first synset
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if hypernyms:
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nltk_result = hypernyms[0].lemmas()[0].name()
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else:
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nltk_result = "Unknown"
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else:
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nltk_result = "Unknown"
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if word in dictionary:
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result = dictionary[word]
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elif nltk_result in ['atmosphere', 'drinks', 'food', 'price', 'service']:
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result = nltk_result
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else:
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result = 'other'
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return result, nltk_result
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def get_outputs(tokenized_text):
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input_ids = tokenized_text["input_ids"]
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token_type_ids = tokenized_text["token_type_ids"]
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attention_mask = tokenized_text["attention_mask"]
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inputs = {
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'input_ids': torch.tensor([input_ids]),
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'token_type_ids': torch.tensor([token_type_ids]),
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'attention_mask': torch.tensor([attention_mask])
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}
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with torch.no_grad():
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outputs = model(**inputs)
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labels = [id2label.get(i) for i in torch.flatten(outputs[1]).tolist()][1:-1]
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return labels
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def join_wordpieces(tokens, labels):
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joined_tokens = []
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for token, label in zip(tokens, labels):
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if label == "O":
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label = None
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if token.startswith("##"):
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last_token = joined_tokens[-1][0]
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joined_tokens[-1] = (last_token+token[2:], label)
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else:
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joined_tokens.append((token, label))
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return joined_tokens
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def get_category(word, dict_file):
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with open(dict_file, "r") as file:
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dictionary = json.load(file)
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r, n = classify_word(word, dictionary)
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return r
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def text_analysis(text):
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tokens, tokenized_text = tokenize_text(text)
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labels = get_outputs(tokenized_text)
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multilabel = convert_to_multilabel(labels)
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token_tuple = join_wordpieces(tokens, labels)
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tokenized_text["tokens"] = tokens
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categories = []
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for tok in token_tuple:
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if tok[1]:
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categories.append((tok[0], get_category(tok[0], "dictionary.json")))
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else:
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categories.append((tok[0], None))
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return token_tuple, multilabel, categories
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theme = gr.themes.Base()
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with gr.Blocks(theme=theme) as demo:
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with gr.Column():
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input_textbox = gr.Textbox(placeholder="Enter sentence here...")
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btn = gr.Button("Submit", variant="primary")
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btn.click(fn=text_analysis,
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inputs=input_textbox,
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outputs=[gr.HighlightedText(label="Token labels"),
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gr.Label(label="Multilabel classification"),
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gr.HighlightedText(label="Category")],
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queue=False)
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with gr.Column():
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examples=[
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["I've been coming here as a child and always come back for the taste."],
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["The tea is great and all the sweets are homemade."],
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["Strong build which really adds to its durability but poor battery life."],
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["We loved the recommendation for the wine, and I think the eggplant parmigiana appetizer should become an entree."]
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]
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gr.Examples(examples, input_textbox)
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demo.launch()
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dictionary.json
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@@ -0,0 +1,899 @@
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|
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|
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|
|
|
1 |
+
{
|
2 |
+
"afternoon": "other",
|
3 |
+
"alfredo": "food",
|
4 |
+
"alternatives": "other",
|
5 |
+
"amazin": "other",
|
6 |
+
"ambiance": "atmosphere",
|
7 |
+
"ambience": "atmosphere",
|
8 |
+
"anchovy": "food",
|
9 |
+
"and": "other",
|
10 |
+
"apetizers": "food",
|
11 |
+
"appetizer": "food",
|
12 |
+
"appetizers": "food",
|
13 |
+
"apple": "food",
|
14 |
+
"area": "other",
|
15 |
+
"argentine": "food",
|
16 |
+
"array": "other",
|
17 |
+
"artifical": "other",
|
18 |
+
"asian": "food",
|
19 |
+
"asparagus": "food",
|
20 |
+
"assortment": "food",
|
21 |
+
"atmoshere": "atmosphere",
|
22 |
+
"atmosphere": "atmosphere",
|
23 |
+
"attitude": "service",
|
24 |
+
"avocado": "food",
|
25 |
+
"back": "other",
|
26 |
+
"baclava": "food",
|
27 |
+
"baked": "food",
|
28 |
+
"ball": "other",
|
29 |
+
"banana": "food",
|
30 |
+
"bar": "atmosphere",
|
31 |
+
"barley": "food",
|
32 |
+
"bartender": "service",
|
33 |
+
"bartenders": "service",
|
34 |
+
"base": "food",
|
35 |
+
"bathroom": "service",
|
36 |
+
"bbq": "food",
|
37 |
+
"beans": "food",
|
38 |
+
"beef": "food",
|
39 |
+
"beer": "drinks",
|
40 |
+
"beers": "drinks",
|
41 |
+
"beets": "food",
|
42 |
+
"benedict": "food",
|
43 |
+
"bi": "other",
|
44 |
+
"big": "other",
|
45 |
+
"bill": "price",
|
46 |
+
"billed": "price",
|
47 |
+
"bistro": "atmosphere",
|
48 |
+
"black": "food",
|
49 |
+
"blended": "food",
|
50 |
+
"blue": "food",
|
51 |
+
"blueberry": "food",
|
52 |
+
"booth": "atmosphere",
|
53 |
+
"bottle": "drinks",
|
54 |
+
"boutique": "other",
|
55 |
+
"braised": "food",
|
56 |
+
"branzini": "food",
|
57 |
+
"bread": "food",
|
58 |
+
"breads": "food",
|
59 |
+
"breakfast": "food",
|
60 |
+
"brisket": "food",
|
61 |
+
"brulee": "food",
|
62 |
+
"brunch": "food",
|
63 |
+
"buffalo": "food",
|
64 |
+
"burger": "food",
|
65 |
+
"burgers": "food",
|
66 |
+
"burrito": "food",
|
67 |
+
"butter": "food",
|
68 |
+
"by": "other",
|
69 |
+
"caeser": "food",
|
70 |
+
"cajun": "food",
|
71 |
+
"cake": "food",
|
72 |
+
"cakes": "food",
|
73 |
+
"calamari": "food",
|
74 |
+
"calf": "food",
|
75 |
+
"canai": "food",
|
76 |
+
"candlelight": "atmosphere",
|
77 |
+
"carinthia": "food",
|
78 |
+
"carrots": "food",
|
79 |
+
"cart": "other",
|
80 |
+
"casseroles": "food",
|
81 |
+
"casual": "atmosphere",
|
82 |
+
"catfish": "food",
|
83 |
+
"caviar": "food",
|
84 |
+
"chair": "atmosphere",
|
85 |
+
"chairs": "atmosphere",
|
86 |
+
"cheese": "food",
|
87 |
+
"cheeses": "food",
|
88 |
+
"chef": "service",
|
89 |
+
"cherry": "food",
|
90 |
+
"chick": "food",
|
91 |
+
"chicken": "food",
|
92 |
+
"chickens": "food",
|
93 |
+
"chickpea": "food",
|
94 |
+
"chickpeas": "food",
|
95 |
+
"chili": "food",
|
96 |
+
"chillis": "food",
|
97 |
+
"chinese": "food",
|
98 |
+
"chocolate": "food",
|
99 |
+
"choices": "other",
|
100 |
+
"chops": "food",
|
101 |
+
"chorizo": "food",
|
102 |
+
"churrasco": "food",
|
103 |
+
"cinna": "food",
|
104 |
+
"classics": "food",
|
105 |
+
"clientele": "other",
|
106 |
+
"cobb": "food",
|
107 |
+
"cocktail": "drinks",
|
108 |
+
"cocoa": "food",
|
109 |
+
"coconut": "food",
|
110 |
+
"cod": "food",
|
111 |
+
"codfish": "food",
|
112 |
+
"coffee": "drinks",
|
113 |
+
"cold": "food",
|
114 |
+
"concoctions": "drinks",
|
115 |
+
"confitte": "food",
|
116 |
+
"cooked": "food",
|
117 |
+
"cookie": "food",
|
118 |
+
"cookies": "food",
|
119 |
+
"corn": "food",
|
120 |
+
"corner": "other",
|
121 |
+
"cosi": "other",
|
122 |
+
"cost": "price",
|
123 |
+
"counter": "other",
|
124 |
+
"courses": "food",
|
125 |
+
"crab": "food",
|
126 |
+
"crabcakes": "food",
|
127 |
+
"cranberry": "food",
|
128 |
+
"creamy": "food",
|
129 |
+
"creme": "food",
|
130 |
+
"creole": "food",
|
131 |
+
"crepes": "food",
|
132 |
+
"crust": "food",
|
133 |
+
"crusted": "food",
|
134 |
+
"cuccumber": "food",
|
135 |
+
"cuisine": "food",
|
136 |
+
"curried": "food",
|
137 |
+
"curry": "food",
|
138 |
+
"dabs": "food",
|
139 |
+
"dance": "atmosphere",
|
140 |
+
"day": "other",
|
141 |
+
"de": "other",
|
142 |
+
"deco": "atmosphere",
|
143 |
+
"decor": "atmosphere",
|
144 |
+
"decoration": "atmosphere",
|
145 |
+
"delights": "food",
|
146 |
+
"delivary": "service",
|
147 |
+
"delivers": "service",
|
148 |
+
"delivery": "service",
|
149 |
+
"delmonico": "food",
|
150 |
+
"deserts": "food",
|
151 |
+
"design": "atmosphere",
|
152 |
+
"dessert": "food",
|
153 |
+
"desserts": "food",
|
154 |
+
"dill": "food",
|
155 |
+
"dine": "service",
|
156 |
+
"dining": "atmosphere",
|
157 |
+
"dinner": "food",
|
158 |
+
"dinners": "food",
|
159 |
+
"dip": "food",
|
160 |
+
"dipping": "food",
|
161 |
+
"disco": "atmosphere",
|
162 |
+
"dish": "food",
|
163 |
+
"dishes": "food",
|
164 |
+
"dishs": "food",
|
165 |
+
"display": "other",
|
166 |
+
"dog": "food",
|
167 |
+
"dogs": "food",
|
168 |
+
"donut": "food",
|
169 |
+
"downstairs": "other",
|
170 |
+
"dressed": "food",
|
171 |
+
"dressing": "food",
|
172 |
+
"drink": "drinks",
|
173 |
+
"drinks": "drinks",
|
174 |
+
"duck": "food",
|
175 |
+
"dumplings": "food",
|
176 |
+
"duo": "other",
|
177 |
+
"eastern": "food",
|
178 |
+
"eating": "other",
|
179 |
+
"egg": "food",
|
180 |
+
"eggplant": "food",
|
181 |
+
"eggs": "food",
|
182 |
+
"emiliana": "food",
|
183 |
+
"empenadas": "food",
|
184 |
+
"english": "food",
|
185 |
+
"entertainment": "atmosphere",
|
186 |
+
"entree": "food",
|
187 |
+
"entrees": "food",
|
188 |
+
"erbazzone": "food",
|
189 |
+
"escargot": "food",
|
190 |
+
"experience": "atmosphere",
|
191 |
+
"fajita": "food",
|
192 |
+
"falafal": "food",
|
193 |
+
"falafel": "food",
|
194 |
+
"famous": "other",
|
195 |
+
"fare": "food",
|
196 |
+
"female": "other",
|
197 |
+
"fennel": "food",
|
198 |
+
"fettuccine": "food",
|
199 |
+
"fettucino": "food",
|
200 |
+
"filet": "food",
|
201 |
+
"fish": "food",
|
202 |
+
"fixe": "price",
|
203 |
+
"flan": "food",
|
204 |
+
"flavor": "food",
|
205 |
+
"flavored": "food",
|
206 |
+
"flavors": "food",
|
207 |
+
"floor": "atmosphere",
|
208 |
+
"focacchia": "food",
|
209 |
+
"foie": "food",
|
210 |
+
"folding": "other",
|
211 |
+
"food": "food",
|
212 |
+
"foods": "food",
|
213 |
+
"fooood": "food",
|
214 |
+
"for": "other",
|
215 |
+
"fork": "other",
|
216 |
+
"fortune": "other",
|
217 |
+
"french": "food",
|
218 |
+
"fresh": "food",
|
219 |
+
"fried": "food",
|
220 |
+
"fries": "food",
|
221 |
+
"frosty": "food",
|
222 |
+
"fruit": "food",
|
223 |
+
"fusion": "food",
|
224 |
+
"garden": "atmosphere",
|
225 |
+
"garlic": "food",
|
226 |
+
"gelato": "food",
|
227 |
+
"ginger": "food",
|
228 |
+
"glass": "other",
|
229 |
+
"gnocchi": "food",
|
230 |
+
"goat": "food",
|
231 |
+
"gorgonzola": "food",
|
232 |
+
"gosht": "food",
|
233 |
+
"grand": "other",
|
234 |
+
"gras": "food",
|
235 |
+
"gratin": "food",
|
236 |
+
"gratuity": "price",
|
237 |
+
"greek": "food",
|
238 |
+
"green": "food",
|
239 |
+
"greens": "food",
|
240 |
+
"grill": "food",
|
241 |
+
"grilled": "food",
|
242 |
+
"ground": "food",
|
243 |
+
"guacamole": "food",
|
244 |
+
"ham": "food",
|
245 |
+
"hamburger": "food",
|
246 |
+
"happy": "other",
|
247 |
+
"hibiscus": "food",
|
248 |
+
"hint": "other",
|
249 |
+
"homemade": "food",
|
250 |
+
"honey": "food",
|
251 |
+
"hong": "food",
|
252 |
+
"host": "service",
|
253 |
+
"hostess": "service",
|
254 |
+
"hot": "food",
|
255 |
+
"hotdogs": "food",
|
256 |
+
"hour": "other",
|
257 |
+
"humus": "food",
|
258 |
+
"ice": "food",
|
259 |
+
"iced": "drinks",
|
260 |
+
"in": "other",
|
261 |
+
"indian": "food",
|
262 |
+
"ingredients": "food",
|
263 |
+
"interior": "atmosphere",
|
264 |
+
"italian": "food",
|
265 |
+
"items": "other",
|
266 |
+
"jap": "food",
|
267 |
+
"japanese": "food",
|
268 |
+
"jazz": "atmosphere",
|
269 |
+
"jerusalem": "food",
|
270 |
+
"juice": "drinks",
|
271 |
+
"juices": "drinks",
|
272 |
+
"kalmata": "food",
|
273 |
+
"kebabs": "food",
|
274 |
+
"kickers": "food",
|
275 |
+
"kimono": "other",
|
276 |
+
"king": "food",
|
277 |
+
"kitchen": "service",
|
278 |
+
"knots": "food",
|
279 |
+
"kompot": "drinks",
|
280 |
+
"kong": "other",
|
281 |
+
"korean": "food",
|
282 |
+
"lamb": "food",
|
283 |
+
"large": "other",
|
284 |
+
"lasagna": "food",
|
285 |
+
"latkes": "food",
|
286 |
+
"latte": "drinks",
|
287 |
+
"leaves": "food",
|
288 |
+
"lemon": "food",
|
289 |
+
"lemonade": "drinks",
|
290 |
+
"lettuce": "food",
|
291 |
+
"li": "other",
|
292 |
+
"life": "other",
|
293 |
+
"light": "atmosphere",
|
294 |
+
"lime": "food",
|
295 |
+
"linguini": "food",
|
296 |
+
"lobster": "food",
|
297 |
+
"location": "atmosphere",
|
298 |
+
"lomo": "food",
|
299 |
+
"long": "other",
|
300 |
+
"lovely": "atmosphere",
|
301 |
+
"low": "other",
|
302 |
+
"lunch": "food",
|
303 |
+
"lychee": "food",
|
304 |
+
"madison": "food",
|
305 |
+
"main": "food",
|
306 |
+
"make": "other",
|
307 |
+
"maki": "food",
|
308 |
+
"mango": "food",
|
309 |
+
"margherita": "food",
|
310 |
+
"margarita": "drinks",
|
311 |
+
"martini": "drinks",
|
312 |
+
"martinis": "drinks",
|
313 |
+
"masala": "food",
|
314 |
+
"mashed": "food",
|
315 |
+
"massaman": "food",
|
316 |
+
"matzo": "food",
|
317 |
+
"meal": "food",
|
318 |
+
"meat": "food",
|
319 |
+
"meatballs": "food",
|
320 |
+
"mediterranean": "food",
|
321 |
+
"melon": "food",
|
322 |
+
"menu": "food",
|
323 |
+
"meringue": "food",
|
324 |
+
"met": "other",
|
325 |
+
"microbrews": "drinks",
|
326 |
+
"midtown": "other",
|
327 |
+
"milk": "food",
|
328 |
+
"mimosa": "drinks",
|
329 |
+
"minestrone": "food",
|
330 |
+
"mixed": "food",
|
331 |
+
"mojito": "drinks",
|
332 |
+
"monkfish": "food",
|
333 |
+
"more": "other",
|
334 |
+
"mousse": "food",
|
335 |
+
"muffin": "food",
|
336 |
+
"muffins": "food",
|
337 |
+
"mushroom": "food",
|
338 |
+
"mushrooms": "food",
|
339 |
+
"music": "atmosphere",
|
340 |
+
"musical": "atmosphere",
|
341 |
+
"mustard": "food",
|
342 |
+
"nasi": "food",
|
343 |
+
"natural": "atmosphere",
|
344 |
+
"noodles": "food",
|
345 |
+
"north": "other",
|
346 |
+
"nova": "food",
|
347 |
+
"oatmeal": "food",
|
348 |
+
"oil": "food",
|
349 |
+
"olives": "food",
|
350 |
+
"omelette": "food",
|
351 |
+
"onion": "food",
|
352 |
+
"open": "other",
|
353 |
+
"opener": "other",
|
354 |
+
"option": "other",
|
355 |
+
"options": "other",
|
356 |
+
"orange": "food",
|
357 |
+
"organic": "food",
|
358 |
+
"out": "other",
|
359 |
+
"outside": "other",
|
360 |
+
"over": "other",
|
361 |
+
"paella": "food",
|
362 |
+
"pan": "food",
|
363 |
+
"pancake": "food",
|
364 |
+
"pancakes": "food",
|
365 |
+
"parfait": "food",
|
366 |
+
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|
367 |
+
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|
368 |
+
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|
369 |
+
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370 |
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371 |
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372 |
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373 |
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374 |
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375 |
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376 |
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377 |
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378 |
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379 |
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380 |
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381 |
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382 |
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383 |
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384 |
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385 |
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386 |
+
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387 |
+
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|
388 |
+
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|
389 |
+
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|
390 |
+
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|
391 |
+
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392 |
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393 |
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394 |
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395 |
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396 |
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397 |
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398 |
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399 |
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|
400 |
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401 |
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402 |
+
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403 |
+
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404 |
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405 |
+
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|
406 |
+
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|
407 |
+
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408 |
+
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409 |
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410 |
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411 |
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|
412 |
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413 |
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414 |
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415 |
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416 |
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417 |
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418 |
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419 |
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420 |
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421 |
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422 |
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423 |
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424 |
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425 |
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427 |
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428 |
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429 |
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430 |
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431 |
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432 |
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433 |
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434 |
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435 |
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436 |
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437 |
+
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438 |
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439 |
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440 |
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441 |
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442 |
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443 |
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444 |
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445 |
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446 |
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447 |
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448 |
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449 |
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450 |
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451 |
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452 |
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453 |
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454 |
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455 |
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456 |
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457 |
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458 |
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459 |
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460 |
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461 |
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462 |
+
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463 |
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464 |
+
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465 |
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466 |
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467 |
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468 |
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469 |
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470 |
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471 |
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472 |
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473 |
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474 |
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475 |
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476 |
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477 |
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478 |
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479 |
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480 |
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481 |
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482 |
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483 |
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484 |
+
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485 |
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486 |
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487 |
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488 |
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489 |
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490 |
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491 |
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492 |
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493 |
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494 |
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495 |
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496 |
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497 |
+
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498 |
+
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499 |
+
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500 |
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501 |
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502 |
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503 |
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504 |
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505 |
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506 |
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507 |
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508 |
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509 |
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510 |
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511 |
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512 |
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513 |
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514 |
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515 |
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516 |
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517 |
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518 |
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519 |
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520 |
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521 |
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522 |
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523 |
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524 |
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525 |
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526 |
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527 |
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528 |
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529 |
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530 |
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531 |
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532 |
+
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533 |
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534 |
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535 |
+
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536 |
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537 |
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|
538 |
+
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|
539 |
+
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540 |
+
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541 |
+
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542 |
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543 |
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544 |
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545 |
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546 |
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547 |
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548 |
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549 |
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550 |
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551 |
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552 |
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553 |
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554 |
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555 |
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556 |
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557 |
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558 |
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559 |
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560 |
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561 |
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562 |
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563 |
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564 |
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|
565 |
+
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|
566 |
+
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567 |
+
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568 |
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569 |
+
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570 |
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571 |
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572 |
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573 |
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574 |
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575 |
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576 |
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577 |
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578 |
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579 |
+
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580 |
+
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|
581 |
+
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582 |
+
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|
583 |
+
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|
584 |
+
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585 |
+
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|
586 |
+
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587 |
+
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|
588 |
+
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|
589 |
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590 |
+
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|
591 |
+
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592 |
+
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593 |
+
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594 |
+
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595 |
+
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596 |
+
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|
597 |
+
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|
598 |
+
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|
599 |
+
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|
600 |
+
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|
601 |
+
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|
602 |
+
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|
603 |
+
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604 |
+
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|
605 |
+
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|
606 |
+
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|
607 |
+
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|
608 |
+
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|
609 |
+
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|
610 |
+
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611 |
+
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|
612 |
+
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|
613 |
+
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|
614 |
+
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|
615 |
+
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616 |
+
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617 |
+
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|
618 |
+
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|
619 |
+
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|
620 |
+
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|
621 |
+
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|
622 |
+
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|
623 |
+
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624 |
+
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|
625 |
+
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|
626 |
+
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|
627 |
+
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|
628 |
+
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|
629 |
+
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|
630 |
+
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|
631 |
+
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|
632 |
+
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633 |
+
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|
634 |
+
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635 |
+
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636 |
+
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637 |
+
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638 |
+
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639 |
+
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640 |
+
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641 |
+
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642 |
+
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|
643 |
+
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644 |
+
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|
645 |
+
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646 |
+
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647 |
+
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|
648 |
+
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649 |
+
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650 |
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651 |
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652 |
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|
653 |
+
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|
654 |
+
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655 |
+
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656 |
+
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657 |
+
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|
658 |
+
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|
659 |
+
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|
660 |
+
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661 |
+
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|
662 |
+
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|
663 |
+
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|
664 |
+
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|
665 |
+
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|
666 |
+
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|
667 |
+
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|
668 |
+
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|
669 |
+
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|
670 |
+
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|
671 |
+
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|
672 |
+
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|
673 |
+
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|
674 |
+
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|
675 |
+
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|
676 |
+
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|
677 |
+
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|
678 |
+
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|
679 |
+
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|
680 |
+
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|
681 |
+
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|
682 |
+
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|
683 |
+
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|
684 |
+
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|
685 |
+
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|
686 |
+
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|
687 |
+
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|
688 |
+
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|
689 |
+
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|
690 |
+
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|
691 |
+
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|
692 |
+
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|
693 |
+
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|
694 |
+
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|
695 |
+
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|
696 |
+
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|
697 |
+
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|
698 |
+
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|
699 |
+
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|
700 |
+
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|
701 |
+
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|
702 |
+
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|
703 |
+
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|
704 |
+
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|
705 |
+
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|
706 |
+
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|
707 |
+
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|
708 |
+
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|
709 |
+
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|
710 |
+
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|
711 |
+
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|
712 |
+
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|
713 |
+
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|
714 |
+
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|
715 |
+
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|
716 |
+
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|
717 |
+
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|
718 |
+
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|
719 |
+
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|
720 |
+
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|
721 |
+
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|
722 |
+
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|
723 |
+
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|
724 |
+
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|
725 |
+
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|
726 |
+
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|
727 |
+
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|
728 |
+
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|
729 |
+
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|
730 |
+
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|
731 |
+
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|
732 |
+
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|
733 |
+
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|
734 |
+
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|
735 |
+
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|
736 |
+
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|
737 |
+
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|
738 |
+
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|
739 |
+
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|
740 |
+
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|
741 |
+
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|
742 |
+
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|
743 |
+
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|
744 |
+
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|
745 |
+
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|
746 |
+
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|
747 |
+
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|
748 |
+
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|
749 |
+
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|
750 |
+
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|
751 |
+
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|
752 |
+
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|
753 |
+
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|
754 |
+
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|
755 |
+
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|
756 |
+
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|
757 |
+
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|
758 |
+
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|
759 |
+
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|
760 |
+
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|
761 |
+
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|
762 |
+
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|
763 |
+
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|
764 |
+
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|
765 |
+
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|
766 |
+
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|
767 |
+
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|
768 |
+
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|
769 |
+
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|
770 |
+
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|
771 |
+
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|
772 |
+
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|
773 |
+
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|
774 |
+
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|
775 |
+
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|
776 |
+
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|
777 |
+
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|
778 |
+
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|
779 |
+
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|
780 |
+
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|
781 |
+
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|
782 |
+
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|
783 |
+
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|
784 |
+
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|
785 |
+
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|
786 |
+
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|
787 |
+
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|
788 |
+
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|
789 |
+
"decore": "other",
|
790 |
+
"oven": "other",
|
791 |
+
"toe": "other",
|
792 |
+
"deluxe": "other",
|
793 |
+
"clientelle": "other",
|
794 |
+
"terrace": "atmosphere",
|
795 |
+
"salsa": "food",
|
796 |
+
"hummus": "food",
|
797 |
+
"attitudes": "service",
|
798 |
+
"color": "other",
|
799 |
+
"leche": "food",
|
800 |
+
"beats": "other",
|
801 |
+
"furnishings": "atmosphere",
|
802 |
+
"spread": "food",
|
803 |
+
"peppers": "food",
|
804 |
+
"coat": "other",
|
805 |
+
"whisper": "atmosphere",
|
806 |
+
"chole": "food",
|
807 |
+
"presentation": "other",
|
808 |
+
"deep": "other",
|
809 |
+
"desert": "food",
|
810 |
+
"cream": "food",
|
811 |
+
"buffet": "food",
|
812 |
+
"frisee": "food",
|
813 |
+
"speck": "food",
|
814 |
+
"diners": "service",
|
815 |
+
"individual": "other",
|
816 |
+
"front": "other",
|
817 |
+
"environment": "atmosphere",
|
818 |
+
"beet": "food",
|
819 |
+
"spring": "other",
|
820 |
+
"marina": "other",
|
821 |
+
"marinated": "food",
|
822 |
+
"tabs": "other",
|
823 |
+
"sardinian": "food",
|
824 |
+
"check": "other",
|
825 |
+
"squid": "food",
|
826 |
+
"bass": "food",
|
827 |
+
"clams": "food",
|
828 |
+
"beginning": "other",
|
829 |
+
"sinatra": "other",
|
830 |
+
"diner": "food",
|
831 |
+
"tic": "other",
|
832 |
+
"backyard": "other",
|
833 |
+
"tomato": "food",
|
834 |
+
"steamed": "food",
|
835 |
+
"per": "other",
|
836 |
+
"breast": "food",
|
837 |
+
"chips": "food",
|
838 |
+
"brown": "other",
|
839 |
+
"sommelier": "service",
|
840 |
+
"servings": "food",
|
841 |
+
"pineapple": "food",
|
842 |
+
"shirted": "other",
|
843 |
+
"oysters": "food",
|
844 |
+
"salt": "food",
|
845 |
+
"fragrant": "other",
|
846 |
+
"dhal": "food",
|
847 |
+
"pleasures": "other",
|
848 |
+
"seat": "service",
|
849 |
+
"appetites": "food",
|
850 |
+
"stained": "other",
|
851 |
+
"samosas": "food",
|
852 |
+
"ceiling": "atmosphere",
|
853 |
+
"escabeche": "food",
|
854 |
+
"crowds": "atmosphere",
|
855 |
+
"club": "other",
|
856 |
+
"bruschetta": "food",
|
857 |
+
"family": "other",
|
858 |
+
"poached": "food",
|
859 |
+
"crew": "service",
|
860 |
+
"temperature": "other",
|
861 |
+
"influence": "other",
|
862 |
+
"plantains": "food",
|
863 |
+
"suggestion": "other",
|
864 |
+
"pico": "food",
|
865 |
+
"bagel": "food",
|
866 |
+
"melt": "food",
|
867 |
+
"bountiful": "other",
|
868 |
+
"drop": "other",
|
869 |
+
"maitre": "service",
|
870 |
+
"artworks": "atmosphere",
|
871 |
+
"sicilian": "food",
|
872 |
+
"alternative": "other",
|
873 |
+
"spot": "other",
|
874 |
+
"kaiseki": "food",
|
875 |
+
"pompous": "other",
|
876 |
+
"comfort": "other",
|
877 |
+
"american": "food",
|
878 |
+
"tap": "drinks",
|
879 |
+
"ribbon": "other",
|
880 |
+
"guy": "other",
|
881 |
+
"customer": "service",
|
882 |
+
"kumquat": "food",
|
883 |
+
"mix": "other",
|
884 |
+
"brioche": "food",
|
885 |
+
"souffle": "food",
|
886 |
+
"knife": "other",
|
887 |
+
"soda": "drinks",
|
888 |
+
"nelson": "other",
|
889 |
+
"faced": "other",
|
890 |
+
"sum": "other",
|
891 |
+
"crowd": "atmosphere",
|
892 |
+
"summer": "other",
|
893 |
+
"holiday": "other",
|
894 |
+
"freaking": "other",
|
895 |
+
"waiter": "service",
|
896 |
+
"waitress": "service",
|
897 |
+
"manager": "service",
|
898 |
+
"servers": "service"
|
899 |
+
}
|
models/BERT_LSTM_CRF.py
ADDED
@@ -0,0 +1,78 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
+
#from transformers import BertPreTrainedModel, BertForSequenceClassification, BertModel
|
2 |
+
from transformers import AutoModel, PreTrainedModel
|
3 |
+
from transformers.modeling_outputs import TokenClassifierOutput
|
4 |
+
from torch import nn
|
5 |
+
from torch.nn import CrossEntropyLoss
|
6 |
+
import torch
|
7 |
+
from .layers import CRF
|
8 |
+
from itertools import islice
|
9 |
+
|
10 |
+
NUM_PER_LAYER = 16
|
11 |
+
|
12 |
+
class BERTLstmCRF(PreTrainedModel):
|
13 |
+
_keys_to_ignore_on_load_unexpected = [r"pooler"]
|
14 |
+
|
15 |
+
def __init__(self, config):
|
16 |
+
super().__init__(config)
|
17 |
+
print(config)
|
18 |
+
self.num_labels = config.num_labels
|
19 |
+
self.bert = AutoModel.from_pretrained(config._name_or_path, config=config, add_pooling_layer=False)
|
20 |
+
classifier_dropout = (config.classifier_dropout if config.classifier_dropout is not None else config.hidden_dropout_prob)
|
21 |
+
self.dropout = nn.Dropout(config.hidden_dropout_prob)
|
22 |
+
self.bilstm = nn.LSTM(config.hidden_size, (config.hidden_size) // 2, batch_first=True, bidirectional=True)
|
23 |
+
self.classifier = nn.Linear(config.hidden_size, config.num_labels)
|
24 |
+
self.crf = CRF(num_tags=config.num_labels, batch_first=True)
|
25 |
+
|
26 |
+
if self.config.freeze == True:
|
27 |
+
self.manage_freezing()
|
28 |
+
|
29 |
+
#self.bert.init_weights() # load pretrained weights
|
30 |
+
|
31 |
+
def manage_freezing(self):
|
32 |
+
for _, param in self.bert.embeddings.named_parameters():
|
33 |
+
param.requires_grad = False
|
34 |
+
|
35 |
+
num_encoders_to_freeze = self.config.num_frozen_encoder
|
36 |
+
if num_encoders_to_freeze > 0:
|
37 |
+
for _, param in islice(self.bert.encoder.named_parameters(), num_encoders_to_freeze*NUM_PER_LAYER):
|
38 |
+
param.requires_grad = False
|
39 |
+
|
40 |
+
|
41 |
+
def forward(self,
|
42 |
+
input_ids=None,
|
43 |
+
attention_mask=None,
|
44 |
+
token_type_ids=None,
|
45 |
+
position_ids=None,
|
46 |
+
head_mask=None,
|
47 |
+
inputs_embeds=None,
|
48 |
+
labels=None,
|
49 |
+
output_attentions=None,
|
50 |
+
output_hidden_states=None,
|
51 |
+
return_dict=None
|
52 |
+
):
|
53 |
+
# Default `model.config.use_return_dict´ is `True´
|
54 |
+
return_dict = return_dict if return_dict is not None else self.config.use_return_dict
|
55 |
+
|
56 |
+
outputs = self.bert(input_ids,
|
57 |
+
attention_mask=attention_mask,
|
58 |
+
token_type_ids=token_type_ids,
|
59 |
+
position_ids=position_ids,
|
60 |
+
head_mask=head_mask,
|
61 |
+
inputs_embeds=inputs_embeds,
|
62 |
+
output_attentions=output_attentions,
|
63 |
+
output_hidden_states=output_hidden_states,
|
64 |
+
return_dict=return_dict)
|
65 |
+
|
66 |
+
sequence_output = outputs[0]
|
67 |
+
sequence_output = self.dropout(sequence_output)
|
68 |
+
lstm_output, hc = self.bilstm(sequence_output)
|
69 |
+
logits = self.classifier(lstm_output)
|
70 |
+
|
71 |
+
loss = None
|
72 |
+
if labels is not None:
|
73 |
+
# During train/test as we don't pass labels during inference
|
74 |
+
loss = -1 * self.crf(logits, labels)
|
75 |
+
|
76 |
+
tags = torch.Tensor(self.crf.decode(logits))
|
77 |
+
|
78 |
+
return loss, tags
|
models/__init__.py
ADDED
@@ -0,0 +1 @@
|
|
|
|
|
1 |
+
from .BERT_LSTM_CRF import BERTLstmCRF
|
models/layers/CRF.py
ADDED
@@ -0,0 +1,353 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
+
# Taken from https://github.com/kmkurn/pytorch-crf/blob/master/torchcrf/__init__.py and fixed got uint8 warning
|
2 |
+
__version__ = '0.7.2'
|
3 |
+
|
4 |
+
from typing import List, Optional
|
5 |
+
|
6 |
+
import torch
|
7 |
+
import torch.nn as nn
|
8 |
+
|
9 |
+
LARGE_NEGATIVE_NUMBER = -1e9
|
10 |
+
|
11 |
+
class CRF(nn.Module):
|
12 |
+
"""Conditional random field.
|
13 |
+
This module implements a conditional random field [LMP01]_. The forward computation
|
14 |
+
of this class computes the log likelihood of the given sequence of tags and
|
15 |
+
emission score tensor. This class also has `~CRF.decode` method which finds
|
16 |
+
the best tag sequence given an emission score tensor using `Viterbi algorithm`_.
|
17 |
+
Args:
|
18 |
+
num_tags: Number of tags.
|
19 |
+
batch_first: Whether the first dimension corresponds to the size of a minibatch.
|
20 |
+
Attributes:
|
21 |
+
start_transitions (`~torch.nn.Parameter`): Start transition score tensor of size
|
22 |
+
``(num_tags,)``.
|
23 |
+
end_transitions (`~torch.nn.Parameter`): End transition score tensor of size
|
24 |
+
``(num_tags,)``.
|
25 |
+
transitions (`~torch.nn.Parameter`): Transition score tensor of size
|
26 |
+
``(num_tags, num_tags)``.
|
27 |
+
.. [LMP01] Lafferty, J., McCallum, A., Pereira, F. (2001).
|
28 |
+
"Conditional random fields: Probabilistic models for segmenting and
|
29 |
+
labeling sequence data". *Proc. 18th International Conf. on Machine
|
30 |
+
Learning*. Morgan Kaufmann. pp. 282–289.
|
31 |
+
.. _Viterbi algorithm: https://en.wikipedia.org/wiki/Viterbi_algorithm
|
32 |
+
"""
|
33 |
+
|
34 |
+
def __init__(self, num_tags: int, batch_first: bool = False) -> None:
|
35 |
+
if num_tags <= 0:
|
36 |
+
raise ValueError(f'invalid number of tags: {num_tags}')
|
37 |
+
super().__init__()
|
38 |
+
self.num_tags = num_tags
|
39 |
+
self.batch_first = batch_first
|
40 |
+
self.start_transitions = nn.Parameter(torch.empty(num_tags))
|
41 |
+
self.end_transitions = nn.Parameter(torch.empty(num_tags))
|
42 |
+
self.transitions = nn.Parameter(torch.empty(num_tags, num_tags))
|
43 |
+
|
44 |
+
self.reset_parameters()
|
45 |
+
self.mask_impossible_transitions()
|
46 |
+
|
47 |
+
def reset_parameters(self) -> None:
|
48 |
+
"""Initialize the transition parameters.
|
49 |
+
The parameters will be initialized randomly from a uniform distribution
|
50 |
+
between -0.1 and 0.1.
|
51 |
+
"""
|
52 |
+
nn.init.uniform_(self.start_transitions, -0.1, 0.1)
|
53 |
+
nn.init.uniform_(self.end_transitions, -0.1, 0.1)
|
54 |
+
nn.init.uniform_(self.transitions, -0.1, 0.1)
|
55 |
+
|
56 |
+
def mask_impossible_transitions(self) -> None:
|
57 |
+
"""Set the value of impossible transitions to LARGE_NEGATIVE_NUMBER
|
58 |
+
- start transition value of I-X
|
59 |
+
- transition score of O -> I
|
60 |
+
"""
|
61 |
+
with torch.no_grad():
|
62 |
+
self.start_transitions[2] = LARGE_NEGATIVE_NUMBER
|
63 |
+
self.start_transitions[4] = LARGE_NEGATIVE_NUMBER
|
64 |
+
self.start_transitions[6] = LARGE_NEGATIVE_NUMBER
|
65 |
+
|
66 |
+
self.transitions[0][2] = LARGE_NEGATIVE_NUMBER
|
67 |
+
self.transitions[0][4] = LARGE_NEGATIVE_NUMBER
|
68 |
+
self.transitions[0][6] = LARGE_NEGATIVE_NUMBER
|
69 |
+
self.transitions[1][4] = LARGE_NEGATIVE_NUMBER
|
70 |
+
self.transitions[1][6] = LARGE_NEGATIVE_NUMBER
|
71 |
+
self.transitions[2][4] = LARGE_NEGATIVE_NUMBER
|
72 |
+
self.transitions[2][6] = LARGE_NEGATIVE_NUMBER
|
73 |
+
self.transitions[3][2] = LARGE_NEGATIVE_NUMBER
|
74 |
+
self.transitions[3][6] = LARGE_NEGATIVE_NUMBER
|
75 |
+
self.transitions[4][2] = LARGE_NEGATIVE_NUMBER
|
76 |
+
self.transitions[4][6] = LARGE_NEGATIVE_NUMBER
|
77 |
+
self.transitions[5][2] = LARGE_NEGATIVE_NUMBER
|
78 |
+
self.transitions[5][4] = LARGE_NEGATIVE_NUMBER
|
79 |
+
self.transitions[6][2] = LARGE_NEGATIVE_NUMBER
|
80 |
+
self.transitions[6][4] = LARGE_NEGATIVE_NUMBER
|
81 |
+
|
82 |
+
def __repr__(self) -> str:
|
83 |
+
return f'{self.__class__.__name__}(num_tags={self.num_tags})'
|
84 |
+
|
85 |
+
def forward(
|
86 |
+
self,
|
87 |
+
emissions: torch.Tensor,
|
88 |
+
tags: torch.LongTensor,
|
89 |
+
mask: Optional[torch.ByteTensor] = None,
|
90 |
+
reduction: str = 'sum',
|
91 |
+
) -> torch.Tensor:
|
92 |
+
"""Compute the conditional log likelihood of a sequence of tags given emission scores.
|
93 |
+
Args:
|
94 |
+
emissions (`~torch.Tensor`): Emission score tensor of size
|
95 |
+
``(seq_length, batch_size, num_tags)`` if ``batch_first`` is ``False``,
|
96 |
+
``(batch_size, seq_length, num_tags)`` otherwise.
|
97 |
+
tags (`~torch.LongTensor`): Sequence of tags tensor of size
|
98 |
+
``(seq_length, batch_size)`` if ``batch_first`` is ``False``,
|
99 |
+
``(batch_size, seq_length)`` otherwise.
|
100 |
+
mask (`~torch.ByteTensor`): Mask tensor of size ``(seq_length, batch_size)``
|
101 |
+
if ``batch_first`` is ``False``, ``(batch_size, seq_length)`` otherwise.
|
102 |
+
reduction: Specifies the reduction to apply to the output:
|
103 |
+
``none|sum|mean|token_mean``. ``none``: no reduction will be applied.
|
104 |
+
``sum``: the output will be summed over batches. ``mean``: the output will be
|
105 |
+
averaged over batches. ``token_mean``: the output will be averaged over tokens.
|
106 |
+
Returns:
|
107 |
+
`~torch.Tensor`: The log likelihood. This will have size ``(batch_size,)`` if
|
108 |
+
reduction is ``none``, ``()`` otherwise.
|
109 |
+
"""
|
110 |
+
#self.mask_impossible_transitions()
|
111 |
+
self._validate(emissions, tags=tags, mask=mask)
|
112 |
+
if reduction not in ('none', 'sum', 'mean', 'token_mean'):
|
113 |
+
raise ValueError(f'invalid reduction: {reduction}')
|
114 |
+
if mask is None:
|
115 |
+
mask = torch.ones_like(tags, dtype=torch.uint8)
|
116 |
+
|
117 |
+
if self.batch_first:
|
118 |
+
emissions = emissions.transpose(0, 1)
|
119 |
+
tags = tags.transpose(0, 1)
|
120 |
+
mask = mask.transpose(0, 1)
|
121 |
+
|
122 |
+
# shape: (batch_size,)
|
123 |
+
numerator = self._compute_score(emissions, tags, mask)
|
124 |
+
# shape: (batch_size,)
|
125 |
+
denominator = self._compute_normalizer(emissions, mask)
|
126 |
+
# shape: (batch_size,)
|
127 |
+
llh = numerator - denominator
|
128 |
+
|
129 |
+
if reduction == 'none':
|
130 |
+
return llh
|
131 |
+
if reduction == 'sum':
|
132 |
+
return llh.sum()
|
133 |
+
if reduction == 'mean':
|
134 |
+
return llh.mean()
|
135 |
+
assert reduction == 'token_mean'
|
136 |
+
return llh.sum() / mask.type_as(emissions).sum()
|
137 |
+
|
138 |
+
def decode(self, emissions: torch.Tensor,
|
139 |
+
mask: Optional[torch.ByteTensor] = None) -> List[List[int]]:
|
140 |
+
"""Find the most likely tag sequence using Viterbi algorithm.
|
141 |
+
Args:
|
142 |
+
emissions (`~torch.Tensor`): Emission score tensor of size
|
143 |
+
``(seq_length, batch_size, num_tags)`` if ``batch_first`` is ``False``,
|
144 |
+
``(batch_size, seq_length, num_tags)`` otherwise.
|
145 |
+
mask (`~torch.ByteTensor`): Mask tensor of size ``(seq_length, batch_size)``
|
146 |
+
if ``batch_first`` is ``False``, ``(batch_size, seq_length)`` otherwise.
|
147 |
+
Returns:
|
148 |
+
List of list containing the best tag sequence for each batch.
|
149 |
+
"""
|
150 |
+
self._validate(emissions, mask=mask)
|
151 |
+
if mask is None:
|
152 |
+
mask = emissions.new_ones(emissions.shape[:2], dtype=torch.uint8)
|
153 |
+
|
154 |
+
if self.batch_first:
|
155 |
+
emissions = emissions.transpose(0, 1)
|
156 |
+
mask = mask.transpose(0, 1)
|
157 |
+
|
158 |
+
return self._viterbi_decode(emissions, mask)
|
159 |
+
|
160 |
+
def _validate(
|
161 |
+
self,
|
162 |
+
emissions: torch.Tensor,
|
163 |
+
tags: Optional[torch.LongTensor] = None,
|
164 |
+
mask: Optional[torch.ByteTensor] = None) -> None:
|
165 |
+
if emissions.dim() != 3:
|
166 |
+
raise ValueError(f'emissions must have dimension of 3, got {emissions.dim()}')
|
167 |
+
if emissions.size(2) != self.num_tags:
|
168 |
+
raise ValueError(
|
169 |
+
f'expected last dimension of emissions is {self.num_tags}, '
|
170 |
+
f'got {emissions.size(2)}')
|
171 |
+
|
172 |
+
if tags is not None:
|
173 |
+
if emissions.shape[:2] != tags.shape:
|
174 |
+
raise ValueError(
|
175 |
+
'the first two dimensions of emissions and tags must match, '
|
176 |
+
f'got {tuple(emissions.shape[:2])} and {tuple(tags.shape)}')
|
177 |
+
|
178 |
+
if mask is not None:
|
179 |
+
if emissions.shape[:2] != mask.shape:
|
180 |
+
raise ValueError(
|
181 |
+
'the first two dimensions of emissions and mask must match, '
|
182 |
+
f'got {tuple(emissions.shape[:2])} and {tuple(mask.shape)}')
|
183 |
+
no_empty_seq = not self.batch_first and mask[0].all()
|
184 |
+
no_empty_seq_bf = self.batch_first and mask[:, 0].all()
|
185 |
+
if not no_empty_seq and not no_empty_seq_bf:
|
186 |
+
raise ValueError('mask of the first timestep must all be on')
|
187 |
+
|
188 |
+
def _compute_score(
|
189 |
+
self, emissions: torch.Tensor, tags: torch.LongTensor,
|
190 |
+
mask: torch.ByteTensor) -> torch.Tensor:
|
191 |
+
# emissions: (seq_length, batch_size, num_tags)
|
192 |
+
# tags: (seq_length, batch_size)
|
193 |
+
# mask: (seq_length, batch_size)
|
194 |
+
assert emissions.dim() == 3 and tags.dim() == 2
|
195 |
+
assert emissions.shape[:2] == tags.shape
|
196 |
+
assert emissions.size(2) == self.num_tags
|
197 |
+
assert mask.shape == tags.shape
|
198 |
+
assert mask[0].all()
|
199 |
+
|
200 |
+
seq_length, batch_size = tags.shape
|
201 |
+
mask = mask.type_as(emissions)
|
202 |
+
|
203 |
+
# Start transition score and first emission
|
204 |
+
# shape: (batch_size,)
|
205 |
+
score = self.start_transitions[tags[0]]
|
206 |
+
score += emissions[0, torch.arange(batch_size), tags[0]]
|
207 |
+
|
208 |
+
for i in range(1, seq_length):
|
209 |
+
# Transition score to next tag, only added if next timestep is valid (mask == 1)
|
210 |
+
# shape: (batch_size,)
|
211 |
+
score += self.transitions[tags[i - 1], tags[i]] * mask[i]
|
212 |
+
|
213 |
+
# Emission score for next tag, only added if next timestep is valid (mask == 1)
|
214 |
+
# shape: (batch_size,)
|
215 |
+
score += emissions[i, torch.arange(batch_size), tags[i]] * mask[i]
|
216 |
+
|
217 |
+
# End transition score
|
218 |
+
# shape: (batch_size,)
|
219 |
+
seq_ends = mask.long().sum(dim=0) - 1
|
220 |
+
# shape: (batch_size,)
|
221 |
+
last_tags = tags[seq_ends, torch.arange(batch_size)]
|
222 |
+
# shape: (batch_size,)
|
223 |
+
score += self.end_transitions[last_tags]
|
224 |
+
|
225 |
+
return score
|
226 |
+
|
227 |
+
def _compute_normalizer(
|
228 |
+
self, emissions: torch.Tensor, mask: torch.ByteTensor) -> torch.Tensor:
|
229 |
+
# emissions: (seq_length, batch_size, num_tags)
|
230 |
+
# mask: (seq_length, batch_size)
|
231 |
+
assert emissions.dim() == 3 and mask.dim() == 2
|
232 |
+
assert emissions.shape[:2] == mask.shape
|
233 |
+
assert emissions.size(2) == self.num_tags
|
234 |
+
assert mask[0].all()
|
235 |
+
|
236 |
+
seq_length = emissions.size(0)
|
237 |
+
|
238 |
+
# Start transition score and first emission; score has size of
|
239 |
+
# (batch_size, num_tags) where for each batch, the j-th column stores
|
240 |
+
# the score that the first timestep has tag j
|
241 |
+
# shape: (batch_size, num_tags)
|
242 |
+
score = self.start_transitions + emissions[0]
|
243 |
+
|
244 |
+
for i in range(1, seq_length):
|
245 |
+
# Broadcast score for every possible next tag
|
246 |
+
# shape: (batch_size, num_tags, 1)
|
247 |
+
broadcast_score = score.unsqueeze(2)
|
248 |
+
|
249 |
+
# Broadcast emission score for every possible current tag
|
250 |
+
# shape: (batch_size, 1, num_tags)
|
251 |
+
broadcast_emissions = emissions[i].unsqueeze(1)
|
252 |
+
|
253 |
+
# Compute the score tensor of size (batch_size, num_tags, num_tags) where
|
254 |
+
# for each sample, entry at row i and column j stores the sum of scores of all
|
255 |
+
# possible tag sequences so far that end with transitioning from tag i to tag j
|
256 |
+
# and emitting
|
257 |
+
# shape: (batch_size, num_tags, num_tags)
|
258 |
+
next_score = broadcast_score + self.transitions + broadcast_emissions
|
259 |
+
|
260 |
+
# Sum over all possible current tags, but we're in score space, so a sum
|
261 |
+
# becomes a log-sum-exp: for each sample, entry i stores the sum of scores of
|
262 |
+
# all possible tag sequences so far, that end in tag i
|
263 |
+
# shape: (batch_size, num_tags)
|
264 |
+
next_score = torch.logsumexp(next_score, dim=1)
|
265 |
+
|
266 |
+
# Set score to the next score if this timestep is valid (mask == 1)
|
267 |
+
# shape: (batch_size, num_tags)
|
268 |
+
score = torch.where(mask[i].unsqueeze(1).bool(), next_score, score)
|
269 |
+
|
270 |
+
# End transition score
|
271 |
+
# shape: (batch_size, num_tags)
|
272 |
+
score += self.end_transitions
|
273 |
+
|
274 |
+
# Sum (log-sum-exp) over all possible tags
|
275 |
+
# shape: (batch_size,)
|
276 |
+
return torch.logsumexp(score, dim=1)
|
277 |
+
|
278 |
+
def _viterbi_decode(self, emissions: torch.FloatTensor,
|
279 |
+
mask: torch.ByteTensor) -> List[List[int]]:
|
280 |
+
# emissions: (seq_length, batch_size, num_tags)
|
281 |
+
# mask: (seq_length, batch_size)
|
282 |
+
assert emissions.dim() == 3 and mask.dim() == 2
|
283 |
+
assert emissions.shape[:2] == mask.shape
|
284 |
+
assert emissions.size(2) == self.num_tags
|
285 |
+
assert mask[0].all()
|
286 |
+
|
287 |
+
seq_length, batch_size = mask.shape
|
288 |
+
|
289 |
+
# Start transition and first emission
|
290 |
+
# shape: (batch_size, num_tags)
|
291 |
+
score = self.start_transitions + emissions[0]
|
292 |
+
history = []
|
293 |
+
|
294 |
+
# score is a tensor of size (batch_size, num_tags) where for every batch,
|
295 |
+
# value at column j stores the score of the best tag sequence so far that ends
|
296 |
+
# with tag j
|
297 |
+
# history saves where the best tags candidate transitioned from; this is used
|
298 |
+
# when we trace back the best tag sequence
|
299 |
+
|
300 |
+
# Viterbi algorithm recursive case: we compute the score of the best tag sequence
|
301 |
+
# for every possible next tag
|
302 |
+
for i in range(1, seq_length):
|
303 |
+
# Broadcast viterbi score for every possible next tag
|
304 |
+
# shape: (batch_size, num_tags, 1)
|
305 |
+
broadcast_score = score.unsqueeze(2)
|
306 |
+
|
307 |
+
# Broadcast emission score for every possible current tag
|
308 |
+
# shape: (batch_size, 1, num_tags)
|
309 |
+
broadcast_emission = emissions[i].unsqueeze(1)
|
310 |
+
|
311 |
+
# Compute the score tensor of size (batch_size, num_tags, num_tags) where
|
312 |
+
# for each sample, entry at row i and column j stores the score of the best
|
313 |
+
# tag sequence so far that ends with transitioning from tag i to tag j and emitting
|
314 |
+
# shape: (batch_size, num_tags, num_tags)
|
315 |
+
next_score = broadcast_score + self.transitions + broadcast_emission
|
316 |
+
|
317 |
+
# Find the maximum score over all possible current tag
|
318 |
+
# shape: (batch_size, num_tags)
|
319 |
+
next_score, indices = next_score.max(dim=1)
|
320 |
+
|
321 |
+
# Set score to the next score if this timestep is valid (mask == 1)
|
322 |
+
# and save the index that produces the next score
|
323 |
+
# shape: (batch_size, num_tags)
|
324 |
+
score = torch.where(mask[i].unsqueeze(1).bool(), next_score, score)
|
325 |
+
history.append(indices)
|
326 |
+
|
327 |
+
# End transition score
|
328 |
+
# shape: (batch_size, num_tags)
|
329 |
+
score += self.end_transitions
|
330 |
+
|
331 |
+
# Now, compute the best path for each sample
|
332 |
+
|
333 |
+
# shape: (batch_size,)
|
334 |
+
seq_ends = mask.long().sum(dim=0) - 1
|
335 |
+
best_tags_list = []
|
336 |
+
|
337 |
+
for idx in range(batch_size):
|
338 |
+
# Find the tag which maximizes the score at the last timestep; this is our best tag
|
339 |
+
# for the last timestep
|
340 |
+
_, best_last_tag = score[idx].max(dim=0)
|
341 |
+
best_tags = [best_last_tag.item()]
|
342 |
+
|
343 |
+
# We trace back where the best last tag comes from, append that to our best tag
|
344 |
+
# sequence, and trace it back again, and so on
|
345 |
+
for hist in reversed(history[:seq_ends[idx]]):
|
346 |
+
best_last_tag = hist[idx][best_tags[-1]]
|
347 |
+
best_tags.append(best_last_tag.item())
|
348 |
+
|
349 |
+
# Reverse the order because we start from the last timestep
|
350 |
+
best_tags.reverse()
|
351 |
+
best_tags_list.append(best_tags)
|
352 |
+
|
353 |
+
return best_tags_list
|
models/layers/__init__.py
ADDED
@@ -0,0 +1 @@
|
|
|
|
|
1 |
+
from .CRF import CRF
|
models/layers/__pycache__/CRF.cpython-310.pyc
ADDED
Binary file (9.37 kB). View file
|
|
models/layers/__pycache__/__init__.cpython-310.pyc
ADDED
Binary file (175 Bytes). View file
|
|