News-Oriented Automatic Chinese Keyword Indexing Sujian Li author Houfeng Wang author Shiwen Yu author Chengsheng Xin author 2003-07 text Proceedings of the Second SIGHAN Workshop on Chinese Language Processing Association for Computational Linguistics Sapporo, Japan conference publication li-etal-2003-news 10.3115/1119250.1119263 https://aclanthology.org/W03-1713/ 2003-07 92 97