Three horses and a person against a sunset.
The horses are different colors.
The colors of the horses may be the same, not different.
exists s1 x1 x2 x3.(a_topic(s1) & subset_of(x2,s1) & against(x2,x3) & n_sunset(x3) & n_person(x2) & subset_of(x1,s1) & n_horse(x1) & card_eq_3(x1))
exists p1 x1 x3.(n_color(x3) & n_horse(x1) & exists x2.((x1 = x2) & -(x2 = x3) & n_color(x2)))