A white dog standing on leaves on the ground.
the dog is black
A dog can either be white or black.
exists s1 x1 x2 x3 x4.(n_ground(x4) & a_topic(x1) & on(x1,x3) & on(x3,x4) & n_leaf(x3) & n_standing(x1) & of(x1,x2) & n_dog(x2) & a_white(s1) & Theme(s1,x1))
exists s1 x1.(n_dog(x1) & Theme(s1,x1) & a_black(s1))