premise: A group of young people with instruments are on stage.
hypothesis: Young people are playing water polo.
explanation_1: The people cannot simultaneously be on stage and be playing water polo
explanation_2: if the young people are on stage they cannot be playing water polo
explanation_3: Water polo is not played with instruments on stage.
premise_logic: exists p1 s1 x1 x2 x3.(exists x4.(on(x1,x4) & n_stage(x4)) & of(x1,x2) & with(x2,x3) & n_instrument(x3) & n_people(x2) & a_young(s1) & Theme(s1,x2) & n_group(x1))
hypothesis_logic: exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_polo(x2) & of(x2,x3) & n_water(x3) & n_people(x1) & a_young(s1) & Theme(s1,x1))