SpanBERT (spanbert-base-cased) fine-tuned on SQuAD v2
SpanBERT created by Facebook Research and fine-tuned on SQuAD 2.0 for Q&A downstream task.
Details of SpanBERT
SpanBERT: Improving Pre-training by Representing and Predicting Spans
Details of the downstream task (Q&A) - Dataset
SQuAD2.0 combines the 100,000 questions in SQuAD1.1 with over 50,000 unanswerable questions written adversarially by crowdworkers to look similar to answerable ones. To do well on SQuAD2.0, systems must not only answer questions when possible, but also determine when no answer is supported by the paragraph and abstain from answering.
| Dataset | Split | # samples |
|---|---|---|
| SQuAD2.0 | train | 130k |
| SQuAD2.0 | eval | 12.3k |
Model training
The model was trained on a Tesla P100 GPU and 25GB of RAM. The script for fine tuning can be found here
Results:
| Metric | # Value |
|---|---|
| EM | 78.80 |
| F1 | 82.22 |
Raw metrics:
{
"exact": 78.80064010780762,
"f1": 82.22801347271162,
"total": 11873,
"HasAns_exact": 78.74493927125506,
"HasAns_f1": 85.60951483831069,
"HasAns_total": 5928,
"NoAns_exact": 78.85618166526493,
"NoAns_f1": 78.85618166526493,
"NoAns_total": 5945,
"best_exact": 78.80064010780762,
"best_exact_thresh": 0.0,
"best_f1": 82.2280134727116,
"best_f1_thresh": 0.0
}
Comparison:
| Model | EM | F1 score |
|---|---|---|
| SpanBert official repo | - | 83.6* |
| spanbert-finetuned-squadv2 | 78.80 | 82.22 |
Model in action
Fast usage with pipelines:
from transformers import pipeline
qa_pipeline = pipeline(
"question-answering",
model="mrm8488/spanbert-finetuned-squadv2",
tokenizer="mrm8488/spanbert-finetuned-squadv2"
)
qa_pipeline({
'context': "Manuel Romero has been working hardly in the repository hugginface/transformers lately",
'question': "Who has been working hard for hugginface/transformers lately?"
})
# Output: {'answer': 'Manuel Romero','end': 13,'score': 6.836378586818937e-09, 'start': 0}
Created by Manuel Romero/@mrm8488
Made with ♥ in Spain