Computational collective intelligence 11th international conference, ICCCI 2019, Hendaye, France, September 4–6, 2019, proceedings, part I - Nguyen, Ngoc Thanh 1963-; Chbeir, Richard 1973-; Exposito, Ernesto; Aniorté, Philippe; Trawiński, Bogdan (Lecture notes in computer science, 2019)