A dog is jumping in some sand.
A dog jumps on the beach.
Not all sand is at the beach.
exists e1 x1 x2.(in(e1,x2) & n_sand(x2) & Actor(e1,x1) & v_jump(e1) & n_dog(x1))
exists e1 x1 x2.(n_beach(x2) & on(e1,x2) & Actor(e1,x1) & v_jump(e1) & n_dog(x1))