People walk down a narrow street between tall buildings.
People are walking on the mountains.
People walking on the mountains are quite unlikely to encounter tall buildings to walk between.
exists e1 s1 s2 x1 x2 x3.(down(e1,x2) & between(x2,x3) & n_building(x3) & a_tall(s2) & Theme(s2,x3) & n_street(x2) & a_narrow(s1) & Theme(s1,x2) & Actor(e1,x1) & v_walk(e1) & n_people(x1))
exists e1 x1 x2.(n_mountain(x2) & on(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_people(x1))