Identifying Noun Product Features that Imply Opinions Lei Zhang author Bing Liu author 2011-06 text Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies Dekang Lin editor Yuji Matsumoto editor Rada Mihalcea editor Association for Computational Linguistics Portland, Oregon, USA conference publication zhang-liu-2011-identifying https://aclanthology.org/P11-2101/ 2011-06 575 580