Artificial Intelligence and Natural Language 6th Conference, AINL 2017, St. Petersburg, Russia, September 20-23, 2017, Revised Selected Papers - Filchenkov, Andrey; Filchenkov, Andrey; Pivovarova, Lidia; Pivovarova, Lidia; Žižka, Jan; Žižka, Jan (Springer International Publishing : Imprint: Springer, 2018)