A CRF Method of Identifying Prepositional Phrases in Chinese Patent Texts Hongzheng Li author Yaohong Jin 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 li-jin-2015-crf 10.18653/v1/W15-3115 https://aclanthology.org/W15-3115/ 2015-07 86 90