A gray bird flies over the water by some rocks.
The bird can fly.
the bird fly on the water in some rocks.
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 e1 p1 x1.(n_bird(x1) & exists e2.(Actor(e2,x1) & v_fly(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_can(e1))