A dog runs in the woods.
The dog is running on the sidewalk.
Woods and sidewalk are not same.
exists e1 x1 x2.(n_wood(x2) & in(e1,x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1))
exists e1 x1 x2.(n_sidewalk(x2) & n_dog(x1) & on(e1,x2) & Actor(e1,x1) & v_run(e1))