Extractive Summarization via ChatGPT for Faithful Summary Generation

Haopeng Zhang, Xiao Liu, Jiawei Zhang


Abstract
Extractive summarization is a crucial task in natural language processing that aims to condense long documents into shorter versions by directly extracting sentences. The recent introduction of large language models has attracted significant interest in the NLP community due to its remarkable performance on a wide range of downstream tasks. This paper first presents a thorough evaluation of ChatGPT’s performance on extractive summarization and compares it with traditional fine-tuning methods on various benchmark datasets. Our experimental analysis reveals that ChatGPT exhibits inferior extractive summarization performance in terms of ROUGE scores compared to existing supervised systems, while achieving higher performance based on LLM-based evaluation metrics. In addition, we explore the effectiveness of in-context learning and chain-of-thought reasoning for enhancing its performance. Furthermore, we find that applying an extract-then-generate pipeline with ChatGPT yields significant performance improvements over abstractive baselines in terms of summary faithfulness. These observations highlight potential directions for enhancing ChatGPT’s capabilities in faithful summarization using two-stage approaches.
Anthology ID:
2023.findings-emnlp.214
Volume:
Findings of the Association for Computational Linguistics: EMNLP 2023
Month:
December
Year:
2023
Address:
Singapore
Editors:
Houda Bouamor, Juan Pino, Kalika Bali
Venue:
Findings
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
3270–3278
Language:
URL:
https://aclanthology.org/2023.findings-emnlp.214
DOI:
10.18653/v1/2023.findings-emnlp.214
Bibkey:
Cite (ACL):
Haopeng Zhang, Xiao Liu, and Jiawei Zhang. 2023. Extractive Summarization via ChatGPT for Faithful Summary Generation. In Findings of the Association for Computational Linguistics: EMNLP 2023, pages 3270–3278, Singapore. Association for Computational Linguistics.
Cite (Informal):
Extractive Summarization via ChatGPT for Faithful Summary Generation (Zhang et al., Findings 2023)
Copy Citation:
PDF:
https://aclanthology.org/2023.findings-emnlp.214.pdf