Grouping Product Features Using Semi-Supervised Learning with Soft-Constraints Zhongwu Zhai author Bing Liu author Hua Xu author Peifa Jia author 2010-08 text Proceedings of the 23rd International Conference on Computational Linguistics (Coling 2010) Chu-Ren Huang editor Dan Jurafsky editor Coling 2010 Organizing Committee Beijing, China conference publication zhai-etal-2010-grouping https://aclanthology.org/C10-1143/ 2010-08 1272 1280