Learning a General Clause-to-Clause Relationships for Enhancing Emotion-Cause Pair Extraction
This work addresses the ECPE task for natural language processing by introducing a foundational relationship, though it is incremental as it builds on prior methods.
The paper tackles the problem of emotion-cause pair extraction (ECPE) by defining a novel clause-to-clause relationship and proposing a general clause-level encoding model called EA-GAT, which integrates with previous approaches and achieves average improvements of 2.1% and 1.03% on Chinese and English benchmark corpora.
Emotion-cause pair extraction (ECPE) is an emerging task aiming to extract potential pairs of emotions and corresponding causes from documents. Previous approaches have focused on modeling the pair-to-pair relationship and achieved promising results. However, the clause-to-clause relationship, which fundamentally symbolizes the underlying structure of a document, has still been in its research infancy. In this paper, we define a novel clause-to-clause relationship. To learn it applicably, we propose a general clause-level encoding model named EA-GAT comprising E-GAT and Activation Sort. E-GAT is designed to aggregate information from different types of clauses; Activation Sort leverages the individual emotion/cause prediction and the sort-based mapping to propel the clause to a more favorable representation. Since EA-GAT is a clause-level encoding model, it can be broadly integrated with any previous approach. Experimental results show that our approach has a significant advantage over all current approaches on the Chinese and English benchmark corpus, with an average of $2.1\%$ and $1.03\%$.