Two dogs play with a toy.
Two cats are fighting.
Dogs are not cats. Playing does not happen when fighting.
exists e1 x1 x2.(with(e1,x2) & n_toy(x2) & Actor(e1,x1) & v_play(e1) & n_dog(x1) & card_eq_2(x1))
exists e1 x1.(Actor(e1,x1) & v_fight(e1) & n_cat(x1) & card_eq_2(x1))