---
language:
- en
tags:
- evidence
- claim
- evidence alignment
---
# Claim-Evidence Alignment TinyBERT tuned classification model


<!-- Provide a quick summary of what the model is/does. -->

This repo contains a tuned [huawei-noah/TinyBERT_General_4L_312D](https://huggingface.co/huawei-noah/TinyBERT_General_4L_312D) model for the classification
of sentence pairs: if the evidence fits the claim. For the training, the following dataset was used: [copenlu/fever_gold_evidence](https://huggingface.co/datasets/copenlu/fever_gold_evidence).

The model is trained on both test and train datasets.

## Usage
```python
model = transformers.AutoModelForSequenceClassification.from_pretrained("yevhenkost/claim_evidence_alignment_fever_gold_tuned_tinybert")
tokenizer = transformers.AutoTokenizer.from_pretrained("yevhenkost/claim_evidence_alignment_fever_gold_tuned_tinybert")

claim_evidence_pairs = [
  ["The water is wet", "The sky is blue"],
["The car crashed", "Driver could not see the road"]
]

tokenized_inputs = tokenizer.batch_encode_plus(
            predict_pairs,
            return_tensors="pt",
            padding=True,
            truncation=True
        )
preds = model(**tokenized_batch_input)

# logits: preds.logits
# 0 - Not aligned;
 1 - aligned 
```

## Dataset Processing
The dataset was processed in the following way: 
```python
import os
from sklearn.model_selection import train_test_split

claims, evidences, labels = [], [], []

# LOADED WITH THE HUGGINGFACE HUB INTO JSONL FORMAT
datadir = "copenlu_fever_gold_evidence/"
for filename in os.listdir(datadir):
    with open(os.path.join(datadir, filename), "r") as f:
        for line in f.read().split("\n"):
            if line:
                row_dict = json.loads(line)
                for evidence in row_dict["evidence"]:
                    evidences.append(evidence[-1])
                    claims.append(row_dict["claim"])
                    if row_dict["label"] != "NOT ENOUGH INFO":
                        labels.append(1)
                    else:
                        labels.append(0)

df = pd.DataFrame()
df["text_a"] = claims
df["text_b"] = evidences
df["labels"] = labels

df = df.drop_duplicates(subset=["text_a", "text_b"])

train_df, eval_df = train_test_split(df, random_state=2, test_size=0.2)
```

### Metrics
```
              precision    recall  f1-score   support

           0       0.86      0.60      0.71     15958
           1       0.86      0.96      0.91     42327

    accuracy                           0.86     58285
   macro avg       0.86      0.78      0.81     58285
weighted avg       0.86      0.86      0.85     58285
```