Two men in front of a wall that's painted yellow.
Two guys are in front of a red wall.
Yellow is not the same color as red.
exists p1 x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & of(x2,x3) & exists s1 x5.((x4 = x5) & n_yellow(x5) & a_painted(s1) & Theme(s1,x5)) & (x3 = x4) & n_wall(x3) & n_front(x2) & n_man(x1) & card_eq_2(x1))
exists p1 x1.(exists s1 x2 x3.(in(x1,x2) & of(x2,x3) & n_wall(x3) & a_red(s1) & Theme(s1,x3) & n_front(x2)) & n_guy(x1) & card_eq_2(x1))