The dog is sitting on the side of the hill.
A dog sits with his owner on the hill.
Not all dogs sitting on a hillside is sitting with his owner.
exists e1 x1 x2 x3.(n_hill(x3) & n_side(x2) & n_dog(x1) & on(e1,x2) & of(x2,x3) & Actor(e1,x1) & v_sit(e1))
exists e1 x1 x2 x3.(n_hill(x3) & with(e1,x2) & on(x2,x3) & n_owner(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_sit(e1) & n_dog(x1))