Chinese NER Using CRFs and Logic for the Fourth SIGHAN Bakeoff Xiaofeng Yu author Wai Lam author Shing-Kit Chan author Yiu Kei Wu author Bo Chen author 2008 text Proceedings of the Sixth SIGHAN Workshop on Chinese Language Processing conference publication yu-etal-2008-chinese-ner https://aclanthology.org/I08-4016/ 2008