Four men are playing instruments on stage.
Four men drinking beer
Men playing instruments on stage cannot be the same drinking beer.
exists e1 x1 x2 x3.(on(e1,x3) & n_stage(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_instrument(x2) & n_man(x1) & card_eq_4(x1))
exists x1 x2 x3.(n_beer(x1) & of(x1,x3) & n_drinking(x3) & of(x1,x2) & n_man(x2) & card_eq_4(x1) & a_topic(x1))