Proceedings of Human Language Technologies: The 2009 Annual Conference of the North American Chapter of the Association for Computational Linguistics, Companion Volume: Tutorial Abstracts Ciprian Chelba editor Paul Kantor editor Brian Roark editor 2009-05 Association for Computational Linguistics Boulder, Colorado text conference publication naacl-2009-human-language-technologies-2009 https://aclanthology.org/N09-4000/