People are walking down the street.
A dog is walking to the store.
A dog is different from people.
exists e1 x1 x2.(n_street(x2) & down(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_people(x1))
exists e1 x1 x2.(n_store(x2) & to(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_dog(x1))