Using Conditional Random Fields to Extract Contexts and Answers of Questions from Online Forums Shilin Ding author Gao Cong author Chin-Yew Lin author Xiaoyan Zhu author 2008-06 text Proceedings of ACL-08: HLT Johanna D Moore editor Simone Teufel editor James Allan editor Sadaoki Furui editor Association for Computational Linguistics Columbus, Ohio conference publication ding-etal-2008-using https://aclanthology.org/P08-1081/ 2008-06 710 718