Question Answering

The model is intended to be used for Q&A task, given the question & context, the model would attempt to infer the answer text, answer span & confidence score.
Model is encoder-only (deepset/roberta-base-squad2) with QuestionAnswering LM Head, fine-tuned on SQUADx dataset with exact_match: 84.83 & f1: 91.80 performance scores.

Live Demo: Question Answering Encoders vs Generative

Please follow this link for Encoder based Question Answering V1
Please follow this link for Generative Question Answering

Example code:

from transformers import pipeline

model_checkpoint = "consciousAI/question-answering-roberta-base-s-v2"

context = """
🤗 Transformers is backed by the three most popular deep learning libraries — Jax, PyTorch and TensorFlow — with a seamless integration
between them. It's straightforward to train your models with one before loading them for inference with the other.
"""
question = "Which deep learning libraries back 🤗 Transformers?"

question_answerer = pipeline("question-answering", model=model_checkpoint)
question_answerer(question=question, context=context)

Training and evaluation data

SQUAD Split

Training procedure

Preprocessing:

SQUAD Data longer chunks were sub-chunked with input context max-length 384 tokens and stride as 128 tokens.
Target answers readjusted for sub-chunks, sub-chunks with no-answers or partial answers were set to target answer span as (0,0)

Metrics:

Adjusted accordingly to handle sub-chunking.
n best = 20
skip answers with length zero or higher than max answer length (30)

Training hyperparameters

Custom Training Loop: The following hyperparameters were used during training:

learning_rate: 2e-5
train_batch_size: 32
eval_batch_size: 32
optimizer: Adam with betas=(0.9,0.999) and epsilon=1e-08
lr_scheduler_type: linear
num_epochs: 2

Training results

{'exact_match': 84.83443708609272, 'f1': 91.79987545811638}

Framework versions

Transformers 4.23.0.dev0
Pytorch 1.12.1+cu113
Datasets 2.5.2
Tokenizers 0.13.0