Improving Opinion Aspect Extraction Using Domain Knowledge and Term Graph
Subject Areas : ICT
Mohammadreza Shams
1
*
,
Ahmad Baraani
2
,
Mahdi Hashemi
3
1 - University of Isfahan
2 - University of Isfahan
3 - University of Isfahan
Keywords: Text mining, Opinion mining, Word2Vec, Aspect Extraction, Domain Knowledge, Term Graph,
Abstract :
With the advancement of technology, analyzing and assessing user opinions, as well as determining the user's attitude toward various aspects, have become a challenging and crucial issue. Opinion mining is the process of recognizing people’s attitudes from textual comments at three different levels: document-level, sentence-level, and aspect-level. Aspect-based Opinion mining analyzes people’s viewpoints on various aspects of a subject. The most important subtask of aspect-based opinion mining is aspect extraction, which is addressed in this paper. Most previous methods suggest a solution that requires labeled data or extensive language resources to extract aspects from the corpus, which can be time consuming and costly to prepare. In this paper, we propose an unsupervised approach for aspect extraction that uses topic modeling and the Word2vec technique to integrate semantic information and domain knowledge based on term graph. The evaluation results show that the proposed method not only outperforms previous methods in terms of aspect extraction accuracy, but also automates all steps and thus eliminates the need for user intervention. Furthermore, because it is not reliant on language resources, it can be used in a wide range of languages.
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