Model Card: T5-base-summarization-claim-extractor

Model Description

Model Name: T5-base-summarization-claim-extractor
Authors: Alessandro Scirè, Karim Ghonim, and Roberto Navigli
Contact: scire@diag.uniroma1.it
Language: English
Primary Use: Extraction of atomic claims from a summary

Overview

The T5-base-summarization-claim-extractor is a model developed for the task of extracting atomic claims from summaries. The model is based on the T5 architecture which is then fine-tuned specifically for claim extraction.

This model was introduced as part of the research presented in the paper "FENICE: Factuality Evaluation of summarization based on Natural Language Inference and Claim Extraction" by Alessandro Scirè, Karim Ghonim, and Roberto Navigli. FENICE leverages Natural Language Inference (NLI) and Claim Extraction to evaluate the factuality of summaries.

Intended Use

This model is designed to:

• Extract atomic claims from summaries.
• Serve as a component in pipelines for factuality evaluation of summaries.

Example Code

from transformers import T5ForConditionalGeneration, T5Tokenizer

tokenizer = T5Tokenizer.from_pretrained("Babelscape/t5-base-summarization-claim-extractor")
model = T5ForConditionalGeneration.from_pretrained("Babelscape/t5-base-summarization-claim-extractor")
summary = 'Simone Biles made a triumphant return to the Olympic stage at the Paris 2024 Games, competing in the women’s gymnastics qualifications. Overcoming a previous struggle with the “twisties” that led to her withdrawal from events at the Tokyo 2020 Olympics, Biles dazzled with strong performances on all apparatus, helping the U.S. team secure a commanding lead in the qualifications. Her routines showcased her resilience and skill, drawing enthusiastic support from a star-studded audience'

tok_input = tokenizer.batch_encode_plus([summary], return_tensors="pt", padding=True)
claims = model.generate(**tok_input)
claims = tokenizer.batch_decode(claims, skip_special_tokens=True)

Note: The model outputs the claims in a single string. Kindly remember to split the string into sentences in order to retrieve the singular claims.

Training

For details regarding the training process, please checkout our paper (section 4.1).

Performance

Model	easinessP	easinessR	easinessF1
GPT-3.5	80.1	70.9	74.9
t5-base-summarization-claim-extractor	79.2	68.8	73.4

Table 1: Easiness Precision (easiness_P), Recall (easiness_R), and F1 score (easiness_F1) results for the LLM-based claim extractor, namely GPT-3.5, and t5-base-summarization-claim-extractor, assessed on ROSE (Liu et al., 2023b).

Further details on the model's performance and the metrics used can be found in the paper (section 4.1).

Main Repository

For more details about FENICE, check out the GitHub repository: Babelscape/FENICE

Citation

If you use this model in your work, please cite the following paper:

@inproceedings{scire-etal-2024-fenice,
    title = "{FENICE}: Factuality Evaluation of summarization based on Natural language Inference and Claim Extraction",
    author = "Scir{\`e}, Alessandro and Ghonim, Karim and Navigli, Roberto",
    editor = "Ku, Lun-Wei  and Martins, Andre and Srikumar, Vivek",
    booktitle = "Findings of the Association for Computational Linguistics ACL 2024",
    month = aug,
    year = "2024",
    address = "Bangkok, Thailand and virtual meeting",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/2024.findings-acl.841",
    pages = "14148--14161",
}

Limitations

• The model is specifically designed for extracting claims from summaries and may not perform well on other types of texts.
• The model is currently available only in English and may not generalize well to other languages.

Ethical Considerations

Users should be aware that while this model extracts claims that can be evaluated for factuality, it does not determine the truthfulness of those claims. Therefore, it should be used in conjunction with other tools or human judgment when evaluating the reliability of summaries.

Acknowledgments

This work was made possible thanks to the support of Babelscape and Sapienza NLP.