When Phrases Meet Probabilities: Enabling Open Relation Extraction with Cooperating Large Language Models

Jiaxin Wang, Lingling Zhang, Wee Sun Lee, Yujie Zhong, Liwei Kang, Jun Liu


Abstract
Current clustering-based open relation extraction (OpenRE) methods usually apply clustering algorithms on top of pre-trained language models. However, this practice has three drawbacks. First, embeddings from language models are high-dimensional and anisotropic, so using simple metrics to calculate distances between these embeddings may not accurately reflect the relational similarity. Second, there exists a gap between the pre-trained language models and downstream clustering for their different objective forms. Third, clustering with embeddings deviates from the primary aim of relation extraction, as it does not directly obtain relations. In this work, we propose a new idea for OpenRE in the era of LLMs, that is, extracting relational phrases and directly exploiting the knowledge in LLMs to assess the semantic similarity between phrases without relying on any additional metrics. Based on this idea, we developed a framework, oreLLM, that makes two LLMs work collaboratively to achieve clustering and address the above issues. Experimental results on different datasets show that oreLLM outperforms current baselines by 1.4%∼ 3.13% in terms of clustering accuracy.
Anthology ID:
2024.acl-long.709
Volume:
Proceedings of the 62nd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)
Month:
August
Year:
2024
Address:
Bangkok, Thailand
Editors:
Lun-Wei Ku, Andre Martins, Vivek Srikumar
Venue:
ACL
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
13130–13147
Language:
URL:
https://aclanthology.org/2024.acl-long.709
DOI:
10.18653/v1/2024.acl-long.709
Bibkey:
Cite (ACL):
Jiaxin Wang, Lingling Zhang, Wee Sun Lee, Yujie Zhong, Liwei Kang, and Jun Liu. 2024. When Phrases Meet Probabilities: Enabling Open Relation Extraction with Cooperating Large Language Models. In Proceedings of the 62nd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers), pages 13130–13147, Bangkok, Thailand. Association for Computational Linguistics.
Cite (Informal):
When Phrases Meet Probabilities: Enabling Open Relation Extraction with Cooperating Large Language Models (Wang et al., ACL 2024)
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PDF:
https://aclanthology.org/2024.acl-long.709.pdf