Candace Sidner author Timothy Bickmore author Charles Rich author Barbara Barry author Lazlo Ring author Morteza Behrooz author Mohammad Shayganfar author 2013-08 text Maxine Eskenazi editor Michael Strube editor Barbara Di Eugenio editor Jason D Williams editor Association for Computational Linguistics Metz, France conference publication sidner-etal-2013-demonstration https://aclanthology.org/W13-4024/ 2013-08 148 150