Flexible Query Answering Systems 12th International Conference, FQAS 2017, London, UK, June 21–22, 2017, Proceedings - Christiansen, Henning; Jaudoin, Hélène; Chountas, Panagiotis; Andreasen, Troels; Legind Larsen, Henrik (Springer International Publishing : Imprint: Springer, 2017)