A bunch of birds outside of a building.
The birds are the same.
A bunch of birds does not necessarily mean a bunch of the same bird.
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 p1 x1 x2.(n_same(x2) & n_bird(x1) & (x1 = x2))