Identifying Prepositional Phrases in Chinese Patent Texts with Rule-based and CRF Methods Hongzheng Li author Yaohong Jin author 2015-10 text Proceedings of the 29th Pacific Asia Conference on Language, Information and Computation Hai Zhao editor Shanghai, China conference publication li-jin-2015-identifying https://aclanthology.org/Y15-1017/ 2015-10 143 149