A dog chases a sheep in an enclosure.
The dog is black.
Not all dogs are black.
exists e1 x1 x2 x3.(in(e1,x3) & n_enclosure(x3) & Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & n_sheep(x2) & n_dog(x1))
exists s1 x1.(n_dog(x1) & Theme(s1,x1) & a_black(s1))