Pair-Based Joint Encoding with Relational Graph Convolutional Networks for Emotion-Cause Pair Extraction

Junlong Liu, Xichen Shang, Qianli Ma


Abstract
Emotion-cause pair extraction (ECPE) aims to extract emotion clauses and corresponding cause clauses, which have recently received growing attention. Previous methods sequentially encode features with a specified order. They first encode the emotion and cause features for clause extraction and then combine them for pair extraction. This lead to an imbalance in inter-task feature interaction where features extracted later have no direct contact with the former. To address this issue, we propose a novel **P**air-**B**ased **J**oint **E**ncoding (**PBJE**) network, which generates pairs and clauses features simultaneously in a joint feature encoding manner to model the causal relationship in clauses. PBJE can balance the information flow among emotion clauses, cause clauses and pairs. From a multi-relational perspective, we construct a heterogeneous undirected graph and apply the Relational Graph Convolutional Network (RGCN) to capture the multiplex relationship between clauses and the relationship between pairs and clauses. Experimental results show that PBJE achieves state-of-the-art performance on the Chinese benchmark corpus.
Anthology ID:
2022.emnlp-main.358
Volume:
Proceedings of the 2022 Conference on Empirical Methods in Natural Language Processing
Month:
December
Year:
2022
Address:
Abu Dhabi, United Arab Emirates
Editors:
Yoav Goldberg, Zornitsa Kozareva, Yue Zhang
Venue:
EMNLP
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
5339–5351
Language:
URL:
https://aclanthology.org/2022.emnlp-main.358
DOI:
10.18653/v1/2022.emnlp-main.358
Bibkey:
Cite (ACL):
Junlong Liu, Xichen Shang, and Qianli Ma. 2022. Pair-Based Joint Encoding with Relational Graph Convolutional Networks for Emotion-Cause Pair Extraction. In Proceedings of the 2022 Conference on Empirical Methods in Natural Language Processing, pages 5339–5351, Abu Dhabi, United Arab Emirates. Association for Computational Linguistics.
Cite (Informal):
Pair-Based Joint Encoding with Relational Graph Convolutional Networks for Emotion-Cause Pair Extraction (Liu et al., EMNLP 2022)
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PDF:
https://aclanthology.org/2022.emnlp-main.358.pdf