Two dogs sharing a toy.
Two cats are fighting over a toy.
The two dogs cannot transform into two cats.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_share(e1) & n_toy(x3) & (x1 = x2) & n_dog(x1) & card_eq_2(x1))
exists e1 x1 x2.(over(e1,x2) & n_toy(x2) & Actor(e1,x1) & v_fight(e1) & n_cat(x1) & card_eq_2(x1))