Two dogs playing on grass.
Two cats fight in the grass.
The animals have to be either dogs or cats.
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_grass(x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_dog(x1) & card_eq_2(x1))
exists x1 x2 x3.(n_grass(x3) & a_topic(x1) & in(x1,x3) & n_fight(x1) & of(x1,x2) & n_cat(x2) & card_eq_2(x1))