Experimental IR meets multilinguality, multimodality, and interaction 10th International Conference of the CLEF Association, CLEF 2019, Lugano, Switzerland, September 9–12, 2019 : proceedings - Crestani, Fabio; Braschler, Martin; Savoy, Jacques; Rauber, Andreas; Müller, Henning; Losada, David E.; Heinatz Bürki, Gundula; Cappellato, Linda; Ferro, Nicola (Springer, 2019)