Two men are playing their guitars and singing on stage.
Men playing guitars on a stage.
There are men playing guitars on stage in both examples.
exists e1 e2 x1 x2 x3 x4.(on(e2,x4) & n_stage(x4) & Actor(e2,x3) & v_sing(e2) & n_man(x3) & card_eq_2(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & of(x2,x1) & n_thing(x1) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x4) & n_stage(x4) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_guitar(x3) & (x1 = x2) & n_man(x1))