Co-Training for Cross-Lingual Sentiment Classification Xiaojun Wan author 2009-08 text Proceedings of the Joint Conference of the 47th Annual Meeting of the ACL and the 4th International Joint Conference on Natural Language Processing of the AFNLP Keh-Yih Su editor Jian Su editor Janyce Wiebe editor Haizhou Li editor Association for Computational Linguistics Suntec, Singapore conference publication wan-2009-co https://aclanthology.org/P09-1027/ 2009-08 235 243