Detecting Bot-Answerable Questions in Ubuntu Chat David Uthus author David Aha author 2013-10 text Proceedings of the Sixth International Joint Conference on Natural Language Processing Ruslan Mitkov editor Jong C Park editor Asian Federation of Natural Language Processing Nagoya, Japan conference publication uthus-aha-2013-detecting https://aclanthology.org/I13-1089/ 2013-10 747 752