Towards Conversational QA: Automatic Identification of Problematic Situations and User Intent Joyce Y Chai author Chen Zhang author Tyler Baldwin author 2006-07 text Proceedings of the COLING/ACL 2006 Main Conference Poster Sessions Association for Computational Linguistics Sydney, Australia conference publication chai-etal-2006-towards https://aclanthology.org/P06-2008/ 2006-07 57 64