Extracting Aspects Hierarchies using Rhetorical Structure Theory [article]

Łukasz Augustyniak, Tomasz Kajdanowicz, Przemysław Kazienko
2019 arXiv   pre-print
We propose a novel approach to generate aspect hierarchies that proved to be consistently correct compared with human-generated hierarchies. We present an unsupervised technique using Rhetorical Structure Theory and graph analysis. We evaluated our approach based on 100,000 reviews from Amazon and achieved an astonishing 80% coverage compared with human-generated hierarchies coded in ConceptNet. The method could be easily extended with a sentiment analysis model and used to describe sentiment
more » ... different levels of aspect granularity. Hence, besides the flat aspect structure, we can differentiate between aspects and describe if the charging aspect is related to battery or price.
arXiv:1909.01800v1 fatcat:n5pwtmghgrggbm2utt3r5ba7cy