Open-ended, Extensible System Utterances Are Preferred, Even If They Require Filled Pauses Timo Baumann author David Schlangen 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 baumann-schlangen-2013-open https://aclanthology.org/W13-4042/ 2013-08 280 283