Two children in front of a red building.
the children are in front of the black building
Red and black are two different colors.
exists s1 x1 x2 x3.(a_topic(x1) & in(x1,x2) & of(x2,x3) & n_building(x3) & a_red(s1) & Theme(s1,x3) & n_front(x2) & n_child(x1) & card_eq_2(x1))
exists p1 s1 x1 x3.(n_building(x3) & a_black(s1) & Theme(s1,x3) & n_child(x1) & exists x2.(in(x1,x2) & of(x2,x3) & n_front(x2)))