Three racing dogs with masks on their mouths.
the dogs are pitbulls
Not all racing dogs are pitbulls.
exists x1 x2 x3 x4.(a_topic(x1) & with(x1,x3) & on(x3,x4) & n_mouth(x4) & of(x4,x1) & n_thing(x1) & n_mask(x3) & n_dog(x1) & of(x1,x2) & n_racing(x2) & card_eq_3(x1))
exists p1 x1.(n_dog(x1) & exists x2.((x1 = x2) & n_pitbull(x2)))