Generating More Specific Questions for Acquiring Attributes of Unknown Concepts from Users Tsugumi Otsuka author Kazunori Komatani author Satoshi Sato author Mikio Nakano author 2013-08 text Proceedings of the SIGDIAL 2013 Conference Maxine Eskenazi editor Michael Strube editor Barbara Di Eugenio editor Jason D Williams editor Association for Computational Linguistics Metz, France conference publication otsuka-etal-2013-generating https://aclanthology.org/W13-4009/ 2013-08 70 77