Advances in Information Retrieval 38th European Conference on IR Research, ECIR 2016, Padua, Italy, March 20–23, 2016. Proceedings - Ferro, Nicola; Crestani, Fabio; Moens, Marie-Francine; Mothe, Josiane; Silvestri, Fabrizio; Nunzio, Giorgio Maria Di; Hauff, Claudia; Silvello, Gianmaria (Springer International Publishing : Imprint: Springer, 2016)