Dog digs in sand
The dogs are by the beach.
Just because dog digs in sand does not mean that the dogs are by the beach.
exists e1 x1 x2.(ne_nam_dog(x1) & in(e1,x2) & n_sand(x2) & Actor(e1,x1) & v_dig(e1))
exists p1 x1 x2.(n_beach(x2) & n_dog(x1) & by(x1,x2))