A group performs on stage.
A group of people are watching a movie.
Performs and watching are different.
exists e1 x1 x2.(on(e1,x2) & n_stage(x2) & Actor(e1,x1) & v_perform(e1) & n_group(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_watch(e1) & n_movie(x3) & of(x1,x2) & n_people(x2) & n_group(x1))