A Bottom-Up Exploration of the Dimensions of Dialog State in Spoken Interaction Nigel G Ward author Alejandro Vega author 2012-07 text Proceedings of the 13th Annual Meeting of the Special Interest Group on Discourse and Dialogue Gary Geunbae Lee editor Jonathan Ginzburg editor Claire Gardent editor Amanda Stent editor Association for Computational Linguistics Seoul, South Korea conference publication ward-vega-2012-bottom https://aclanthology.org/W12-1628/ 2012-07 198 206