Two police are on patrol on two horses.
Both of the horses are black.
Just because two police are on patrol on two horses does not indicate that horses are black.
exists p1 x1.(exists x2 x3.(on(x1,x2) & on(x2,x3) & n_horse(x3) & card_eq_2(x3) & n_patrol(x2)) & n_police(x1) & card_eq_2(x1))
exists s1 x1 x2.(n_horse(x2) & Theme(s1,x1) & a_black(s1) & of(x1,x2) & n_thing(x1))