CT-SPA: Text sentiment polarity prediction model using semi-automatically expanded sentiment lexicon Tao-Hsing Chang author Ming-Jhih Lin author Chun-Hsien Chen author Shao-Yu Wang author 2015-07 text Proceedings of the Eighth SIGHAN Workshop on Chinese Language Processing Liang-Chih Yu editor Zhifang Sui editor Yue Zhang editor Vincent Ng editor Association for Computational Linguistics Beijing, China conference publication chang-etal-2015-ct 10.18653/v1/W15-3125 https://aclanthology.org/W15-3125/ 2015-07 164 170