People are walking on the front grounds of a large building.
they are inside.
The front grounds are not inside.
exists e1 s1 s2 x1 x2 x3.(n_grounds(x2) & a_front(s1) & Theme(s1,x2) & on(e1,x2) & of(x2,x3) & n_building(x3) & a_large(s2) & Theme(s2,x3) & Actor(e1,x1) & v_walk(e1) & n_people(x1))
exists e1 s1 x1.(n_thing(x1) & a_inside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_be(e1))