Olivier Pietquin Smaranda Muresan Vivian Chen Casey Kennington David Vandyke Nina Dethlefs Koji Inoue Erik Ekstedt Stefan Ultes Proceedings of the 21th Annual Meeting of the Special Interest Group on Discourse and Dialogue, SIGdial 2020, 1st virtual meeting, July 1-3, 2020 SIGdial Association for Computational Linguistics 2020 978-1-952148-02-6 https://aclanthology.org/volumes/2020.sigdial-1/ https://aclanthology.org/2020.sigdial-1.0/ db/conf/sigdial/sigdial2020.html