Aspect Extraction from Product Reviews Using Category Hierarchy Information Yinfei Yang author Cen Chen author Minghui Qiu author Forrest Bao author 2017-04 text Proceedings of the 15th Conference of the European Chapter of the Association for Computational Linguistics: Volume 2, Short Papers Mirella Lapata editor Phil Blunsom editor Alexander Koller editor Association for Computational Linguistics Valencia, Spain conference publication yang-etal-2017-aspect https://aclanthology.org/E17-2107/ 2017-04 675 680