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--- |
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language: ro |
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tags: |
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- bert |
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- fill-mask |
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license: mit |
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--- |
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# bert-base-romanian-cased-v1 |
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The BERT **base**, **cased** model for Romanian, trained on a 15GB corpus, version  |
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### How to use |
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```python |
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from transformers import AutoTokenizer, AutoModel |
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import torch |
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# load tokenizer and model |
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tokenizer = AutoTokenizer.from_pretrained("dumitrescustefan/bert-base-romanian-cased-v1") |
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model = AutoModel.from_pretrained("dumitrescustefan/bert-base-romanian-cased-v1") |
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# tokenize a sentence and run through the model |
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input_ids = torch.tensor(tokenizer.encode("Acesta este un test.", add_special_tokens=True)).unsqueeze(0) # Batch size 1 |
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outputs = model(input_ids) |
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# get encoding |
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last_hidden_states = outputs[0] # The last hidden-state is the first element of the output tuple |
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``` |
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Remember to always sanitize your text! Replace ``s`` and ``t`` cedilla-letters to comma-letters with : |
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``` |
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text = text.replace("ţ", "ț").replace("ş", "ș").replace("Ţ", "Ț").replace("Ş", "Ș") |
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``` |
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because the model was **NOT** trained on cedilla ``s`` and ``t``s. If you don't, you will have decreased performance due to ``<UNK>``s and increased number of tokens per word. |
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### Evaluation |
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Evaluation is performed on Universal Dependencies [Romanian RRT](https://universaldependencies.org/treebanks/ro_rrt/index.html) UPOS, XPOS and LAS, and on a NER task based on [RONEC](https://github.com/dumitrescustefan/ronec). Details, as well as more in-depth tests not shown here, are given in the dedicated [evaluation page](https://github.com/dumitrescustefan/Romanian-Transformers/tree/master/evaluation/README.md). |
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The baseline is the [Multilingual BERT](https://github.com/google-research/bert/blob/master/multilingual.md) model ``bert-base-multilingual-(un)cased``, as at the time of writing it was the only available BERT model that works on Romanian. |
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| Model | UPOS | XPOS | NER | LAS | |
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|--------------------------------|:-----:|:------:|:-----:|:-----:| |
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| bert-base-multilingual-cased | 97.87 | 96.16 | 84.13 | 88.04 | |
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| bert-base-romanian-cased-v1 | **98.00** | **96.46** | **85.88** | **89.69** | |
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### Corpus |
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The model is trained on the following corpora (stats in the table below are after cleaning): |
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| Corpus | Lines(M) | Words(M) | Chars(B) | Size(GB) | |
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|-----------|:--------:|:--------:|:--------:|:--------:| |
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| OPUS | 55.05 | 635.04 | 4.045 | 3.8 | |
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| OSCAR | 33.56 | 1725.82 | 11.411 | 11 | |
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| Wikipedia | 1.54 | 60.47 | 0.411 | 0.4 | |
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| **Total** | **90.15** | **2421.33** | **15.867** | **15.2** | |
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### Citation |
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If you use this model in a research paper, I'd kindly ask you to cite the following paper: |
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``` |
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Stefan Dumitrescu, Andrei-Marius Avram, and Sampo Pyysalo. 2020. The birth of Romanian BERT. In Findings of the Association for Computational Linguistics: EMNLP 2020, pages 4324–4328, Online. Association for Computational Linguistics. |
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``` |
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or, in bibtex: |
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``` |
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@inproceedings{dumitrescu-etal-2020-birth, |
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title = "The birth of {R}omanian {BERT}", |
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author = "Dumitrescu, Stefan and |
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Avram, Andrei-Marius and |
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Pyysalo, Sampo", |
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booktitle = "Findings of the Association for Computational Linguistics: EMNLP 2020", |
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month = nov, |
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year = "2020", |
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address = "Online", |
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publisher = "Association for Computational Linguistics", |
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url = "https://aclanthology.org/2020.findings-emnlp.387", |
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doi = "10.18653/v1/2020.findings-emnlp.387", |
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pages = "4324--4328", |
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} |
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``` |
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#### Acknowledgements |
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- We'd like to thank [Sampo Pyysalo](https://github.com/spyysalo) from TurkuNLP for helping us out with the compute needed to pretrain the v1.0 BERT models. He's awesome! |
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