A dog running through the sand.
A dog is running on the beach.
Not all sand is on the beach.
exists e1 x1 x2 x3.(n_sand(x3) & a_topic(x1) & through(e1,x3) & Actor(e1,x2) & v_run(e1) & (x1 = x2) & n_dog(x1))
exists e1 x1 x2.(n_beach(x2) & on(e1,x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1))