FENICE: Factuality Evaluation of summarization based on Natural language Inference and Claim Extraction

Alessandro Scirè, Karim Ghonim, Roberto Navigli


Abstract
Recent advancements in text summarization, particularly with the advent of Large Language Models (LLMs), have shown remarkable performance. However, a notable challenge persists as a substantial number of automatically-generated summaries exhibit factual inconsistencies, such as hallucinations. In response to this issue, various approaches for the evaluation of consistency for summarization have emerged. Yet, these newly-introduced metrics face several limitations, including lack of interpretability, focus on short document summaries (e.g., news articles), and computational impracticality, especially for LLM-based metrics. To address these shortcomings, we propose Factuality Evaluation of summarization based on Natural language Inference and Claim Extraction (FENICE), a more interpretable and efficient factuality-oriented metric. FENICE leverages an NLI-based alignment between information in the source document and a set of atomic facts, referred to as claims, extracted from the summary. Our metric sets a new state of the art on AGGREFACT, the de-facto benchmark for factuality evaluation. Moreover, we extend our evaluation to a more challenging setting by conducting a human annotation process of long-form summarization. In the hope of fostering research in summarization factuality evaluation, we release the code of our metric and our factuality annotations of long-form summarization at anonymizedurl.
Anthology ID:
2024.findings-acl.841
Volume:
Findings of the Association for Computational Linguistics: ACL 2024
Month:
August
Year:
2024
Address:
Bangkok, Thailand
Editors:
Lun-Wei Ku, Andre Martins, Vivek Srikumar
Venue:
Findings
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
14148–14161
Language:
URL:
https://aclanthology.org/2024.findings-acl.841
DOI:
10.18653/v1/2024.findings-acl.841
Bibkey:
Cite (ACL):
Alessandro Scirè, Karim Ghonim, and Roberto Navigli. 2024. FENICE: Factuality Evaluation of summarization based on Natural language Inference and Claim Extraction. In Findings of the Association for Computational Linguistics: ACL 2024, pages 14148–14161, Bangkok, Thailand. Association for Computational Linguistics.
Cite (Informal):
FENICE: Factuality Evaluation of summarization based on Natural language Inference and Claim Extraction (Scirè et al., Findings 2024)
Copy Citation:
PDF:
https://aclanthology.org/2024.findings-acl.841.pdf