A Novel Table-to-Graph Generation Approach for Document-Level Joint Entity and Relation Extraction

Ruoyu Zhang, Yanzeng Li, Lei Zou


Abstract
Document-level relation extraction (DocRE) aims to extract relations among entities within a document, which is crucial for applications like knowledge graph construction. Existing methods usually assume that entities and their mentions are identified beforehand, which falls short of real-world applications. To overcome this limitation, we propose TaG, a novel table-to-graph generation model for joint extractionof entities and relations at document-level. To enhance the learning of task dependencies, TaG induces a latent graph among mentions, with different types of edges indicating different task information, which is further broadcast with a relational graph convolutional network. To alleviate the error propagation problem, we adapt the hierarchical agglomerative clustering algorithm to back-propagate task information at decoding stage. Experiments on the benchmark dataset, DocRED, demonstrate that TaG surpasses previous methods by a large margin and achieves state-of-the-art results.
Anthology ID:
2023.acl-long.607
Volume:
Proceedings of the 61st Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)
Month:
July
Year:
2023
Address:
Toronto, Canada
Editors:
Anna Rogers, Jordan Boyd-Graber, Naoaki Okazaki
Venue:
ACL
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
10853–10865
Language:
URL:
https://aclanthology.org/2023.acl-long.607
DOI:
10.18653/v1/2023.acl-long.607
Bibkey:
Cite (ACL):
Ruoyu Zhang, Yanzeng Li, and Lei Zou. 2023. A Novel Table-to-Graph Generation Approach for Document-Level Joint Entity and Relation Extraction. In Proceedings of the 61st Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers), pages 10853–10865, Toronto, Canada. Association for Computational Linguistics.
Cite (Informal):
A Novel Table-to-Graph Generation Approach for Document-Level Joint Entity and Relation Extraction (Zhang et al., ACL 2023)
Copy Citation:
PDF:
https://aclanthology.org/2023.acl-long.607.pdf
Video:
 https://aclanthology.org/2023.acl-long.607.mp4