Adding Redundant Features for CRFs-based Sentence Sentiment Classification Jun Zhao author Kang Liu author Gen Wang author 2008-10 text Proceedings of the 2008 Conference on Empirical Methods in Natural Language Processing Mirella Lapata editor Hwee Tou Ng editor Association for Computational Linguistics Honolulu, Hawaii conference publication zhao-etal-2008-adding https://aclanthology.org/D08-1013/ 2008-10 117 126