The Representation of Multimodal User Interface Dialogues Using Discourse Pegs Susann Luperfoy author 1992-06 text 30th Annual Meeting of the Association for Computational Linguistics Association for Computational Linguistics Newark, Delaware, USA conference publication luperfoy-1992-representation 10.3115/981967.981971 https://aclanthology.org/P92-1004/ 1992-06 22 31