Discriminative state tracking for spoken dialog systems Angeliki Metallinou author Dan Bohus author Jason Williams author 2013-08 text Proceedings of the 51st Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers) Hinrich Schuetze editor Pascale Fung editor Massimo Poesio editor Association for Computational Linguistics Sofia, Bulgaria conference publication metallinou-etal-2013-discriminative https://aclanthology.org/P13-1046/ 2013-08 466 475