A gray bird flies over the water by some rocks.
The bird is black.
gray is not black
exists e1 s1 x1 x2 x3.(n_water(x2) & by(e1,x3) & n_rock(x3) & over(e1,x2) & Actor(e1,x1) & v_fly(e1) & n_bird(x1) & a_gray(s1) & Theme(s1,x1))
exists s1 x1.(n_bird(x1) & Theme(s1,x1) & a_black(s1))