A bunch of birds outside of a building.
A group of birds fly above a building.
Being outside of something is not necessarily being above it.  Birds do not always fly.
exists x1 x2 x3 x4.(a_topic(x1) & of(x3,x4) & n_building(x4) & outside(x1,x3) & n_thing(x3) & of(x1,x2) & n_bird(x2) & n_bunch(x1))
exists e1 x1 x2 x3.(above(e1,x3) & n_building(x3) & Actor(e1,x1) & v_fly(e1) & of(x1,x2) & n_bird(x2) & n_group(x1))