Effective Inter-Clause Modeling for End-to-End Emotion-Cause Pair Extraction

Penghui Wei, Jiahao Zhao, Wenji Mao


Abstract
Emotion-cause pair extraction aims to extract all emotion clauses coupled with their cause clauses from a given document. Previous work employs two-step approaches, in which the first step extracts emotion clauses and cause clauses separately, and the second step trains a classifier to filter out negative pairs. However, such pipeline-style system for emotion-cause pair extraction is suboptimal because it suffers from error propagation and the two steps may not adapt to each other well. In this paper, we tackle emotion-cause pair extraction from a ranking perspective, i.e., ranking clause pair candidates in a document, and propose a one-step neural approach which emphasizes inter-clause modeling to perform end-to-end extraction. It models the interrelations between the clauses in a document to learn clause representations with graph attention, and enhances clause pair representations with kernel-based relative position embedding for effective ranking. Experimental results show that our approach significantly outperforms the current two-step systems, especially in the condition of extracting multiple pairs in one document.
Anthology ID:
2020.acl-main.289
Volume:
Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics
Month:
July
Year:
2020
Address:
Online
Editors:
Dan Jurafsky, Joyce Chai, Natalie Schluter, Joel Tetreault
Venue:
ACL
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
3171–3181
Language:
URL:
https://aclanthology.org/2020.acl-main.289
DOI:
10.18653/v1/2020.acl-main.289
Bibkey:
Cite (ACL):
Penghui Wei, Jiahao Zhao, and Wenji Mao. 2020. Effective Inter-Clause Modeling for End-to-End Emotion-Cause Pair Extraction. In Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics, pages 3171–3181, Online. Association for Computational Linguistics.
Cite (Informal):
Effective Inter-Clause Modeling for End-to-End Emotion-Cause Pair Extraction (Wei et al., ACL 2020)
Copy Citation:
PDF:
https://aclanthology.org/2020.acl-main.289.pdf
Video:
 http://slideslive.com/38928827
Data
Xia and Ding, 2019