A boy walks near buildings.
A kid is walking in a city.
A boy near buildings does not imply that he is in a city.
exists e1 x1 x2.(near(e1,x2) & n_building(x2) & Actor(e1,x1) & v_walk(e1) & n_boy(x1))
exists e1 x1 x2.(in(e1,x2) & n_city(x2) & Actor(e1,x1) & v_walk(e1) & n_kid(x1))