Proceedings of the Joint Conference of the 47th Annual Meeting of the ACL and the 4th International Joint Conference on Natural Language Processing of the AFNLP Keh-Yih Su editor Jian Su editor Janyce Wiebe editor Haizhou Li editor 2009-08 Association for Computational Linguistics Suntec, Singapore text conference publication acl-2009-joint https://aclanthology.org/P09-1000/