Kinds of Features for Chinese Opinionated Information Retrieval Taras Zagibalov author 2007-06 text Proceedings of the ACL 2007 Student Research Workshop Chris Biemann editor Violeta Seretan editor Ellen Riloff editor Association for Computational Linguistics Prague, Czech Republic conference publication zagibalov-2007-kinds https://aclanthology.org/P07-3007/ 2007-06 37 42