A band performing on stage.
A group of people on the stage.
A band consists of a group of people.
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_stage(x3) & Actor(e1,x2) & v_perform(e1) & (x1 = x2) & n_band(x1))
exists x1 x2 x3.(n_stage(x3) & a_topic(x1) & of(x1,x2) & on(x2,x3) & n_people(x2) & n_group(x1))