Confirmation in Multimodal Systems David R McGee author Phil R Cohen author Sharon Oviatt author 1998-08 text 36th Annual Meeting of the Association for Computational Linguistics and 17th International Conference on Computational Linguistics, Volume 2 Association for Computational Linguistics Montreal, Quebec, Canada conference publication mcgee-etal-1998-confirmation 10.3115/980691.980705 https://aclanthology.org/P98-2136/ 1998-08 823 829