BANG project team, INRIA Rocquencourt, Le Chesnay, Yvelines, France. annabelle.ballesta@inria.fr|BANG project team, INRIA Rocquencourt, Le Chesnay, Yvelines, France. annabelle.ballesta@inria.fr|BANG project team, INRIA Rocquencourt, Le Chesnay, Yvelines, France. annabelle.ballesta@inria.fr|BANG project team, INRIA Rocquencourt, Le Chesnay, Yvelines, France. annabelle.ballesta@inria.fr|BANG project team, INRIA Rocquencourt, Le Chesnay, Yvelines, France. annabelle.ballesta@inria.fr|BANG project team, INRIA Rocquencourt, Le Chesnay, Yvelines, France. annabelle.ballesta@inria.fr