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Aspect-Based Sentiment Analysis using BERT

Mickel Hoang
Chalmers University of Technology, Gothenburg, Chalmers University of Technology, Sweden

Oskar Alija Bihorac
Chalmers University of Technology, Gothenburg, Chalmers University of Technology, Sweden

Jacobo Rouces
Språkbanken, University of Gothenburg, Sweden

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Ingår i: Proceedings of the 22nd Nordic Conference on Computational Linguistics (NoDaLiDa), September 30 - October 2, Turku, Finland

Linköping Electronic Conference Proceedings 167:20, s. 187--196

NEALT Proceedings Series 42:20, s. 187--196

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Publicerad: 2019-10-02

ISBN: 978-91-7929-995-8

ISSN: 1650-3686 (tryckt), 1650-3740 (online)

Abstract

Sentiment analysis has become very popular in both research and business due to the increasing amount of opinionated text from Internet users. Standard sentiment analysis deals with classifying the overall sentiment of a text, but this doesn’t include other important information such as towards which entity, topic or aspect within the text the sentiment is directed. Aspect-based sentiment analysis (ABSA) is a more complex task that consists in identifying both sentiments and aspects. This paper shows the potential of using the contextual word representations from the pre-trained language model BERT, together with a fine-tuning method with additional generated text, in order to solve out-of-domain ABSA and outperform previous state-of-the-art results on SemEval-2015 Task 12 subtask 2 and SemEval-2016 Task 5. To the best of our knowledge, no other existing work has been done on out-of-domain ABSA for aspect classification.

Nyckelord

BERT ASPECT-BASED SENTIMENT ANALYSIS SENTIMENT ANALYSIS PRE-TRAINED LANGUAGE MODEL

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