Two kids play hockey on a pond.
Two kids are playing football.
hockey is not football
exists e1 x1 x2 x3.(on(e1,x3) & n_pond(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_hockey(x2) & n_kid(x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_football(x2) & n_kid(x1) & card_eq_2(x1))