Feature Representation Extraction Method of Hotel Reviews Using Co-occurrence Restriction and Dependency Graph

Hotel reviews posted on accommodation reservation websites are thought to be valuable information for selecting hotel accommodations and also expected to be used for marketing. Since hotel reviews are various in their expressions, it was necessary to make a thesaurus to obtain useful feature representations. Preparing a thesaurus, however, has problems such that it is laborious and requires occasional revisions. In addition, it is necessary to determine subjects of evaluation in advance and set up synonyms for them. Thus, the analysis of subjects not under consideration becomes difficult. In the present study, we first graphed impression comments using co-occurrence restrictions and dependency structures and then extracted feature representations by clustering the graphs. This enabled us to extract feature representations on evaluation from the impression comments in hotel reviews without setting up subjects of evaluation in advance and a thesaurus.