Three people in a band are playing on stage.
People playing music on a platform.
A band of three people are playing music on a platform stage.
exists e1 x1 x2 x3.(on(e1,x3) & n_stage(x3) & Actor(e1,x1) & v_play(e1) & in(x1,x2) & n_band(x2) & n_people(x1) & card_eq_3(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x4) & n_platform(x4) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_music(x3) & (x1 = x2) & n_people(x1))