Experimental IR Meets Multilinguality, Multimodality, and Interaction 9th International Conference of the CLEF Association, CLEF 2018, Avignon, France, September 10-14, 2018, Proceedings - Bellot, Patrice; Bellot, Patrice; Trabelsi, Chiraz; Trabelsi, Chiraz; Mothe, Josiane; Mothe, Josiane; Murtagh, Fionn; Murtagh, Fionn; Nie, Jian Yun; Nie, Jian Yun; Soulier, Laure; Soulier, Laure; et al. (Springer International Publishing : Imprint: Springer, 2018)