Two dogs playing on the shore.
Two squirrels are playing.
The subjects cannot be dogs and squirrels.
exists e1 x1 x2 x3.(n_shore(x3) & a_topic(x1) & on(e1,x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_dog(x1) & card_eq_2(x1))
exists e1 x1.(Actor(e1,x1) & v_play(e1) & n_squirrel(x1) & card_eq_2(x1))