AI*IA 2019 - Advances in Artificial Intelligence XVIIIth International Conference of the Italian Association for Artificial Intelligence, Rende, Italy, November 19-22, 2019, Proceedings - Alviano, Mario; Alviano, Mario; Greco, Gianluigi; Greco, Gianluigi; Scarcello, Francesco; Scarcello, Francesco (Springer International Publishing : Imprint: Springer, 2019)