Structured Sentiment Analysis as Dependency Graph Parsing

Autor:	Barnes, Jeremy, Kurtz, Robin, Oepen, Stephan, Øvrelid, Lilja, Velldal, Erik
Rok vydání:	2021
Předmět:	Computer Science - Computation and Language
Druh dokumentu:	Working Paper
Popis:	Structured sentiment analysis attempts to extract full opinion tuples from a text, but over time this task has been subdivided into smaller and smaller sub-tasks, e,g,, target extraction or targeted polarity classification. We argue that this division has become counterproductive and propose a new unified framework to remedy the situation. We cast the structured sentiment problem as dependency graph parsing, where the nodes are spans of sentiment holders, targets and expressions, and the arcs are the relations between them. We perform experiments on five datasets in four languages (English, Norwegian, Basque, and Catalan) and show that this approach leads to strong improvements over state-of-the-art baselines. Our analysis shows that refining the sentiment graphs with syntactic dependency information further improves results. Comment: Accepted at ACL-IJCNLP 2021
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2105.14504 Zobrazit plný text záznamu View this record from Arxiv