A man and a boy standing around a bunch of pigeons.
A man and a boy are at a park.
the man and boy are not necessarily at a park.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(s1) & subset_of(x2,s1) & around(e1,x4) & of(x4,x5) & n_pigeon(x5) & n_bunch(x4) & Actor(e1,x3) & v_stand(e1) & (x2 = x3) & n_boy(x2) & subset_of(x1,s1) & n_man(x1))
exists p1 x1 x2 x3.(exists x4.(at(x1,x4) & n_park(x4)) & subset_of(x3,x1) & n_boy(x3) & subset_of(x2,x1) & n_man(x2))