Korean Named Entity Recognition using HMM and CoTraining Model Euisok Chung author Yi-Gyu Hwang author Myung-Gil Jang author 2003-07 text Proceedings of the Sixth International Workshop on Information Retrieval with Asian Languages Association for Computational Linguistics Sapporo, Japan conference publication chung-etal-2003-korean 10.3115/1118935.1118956 https://aclanthology.org/W03-1121/ 2003-07 161 167