A girl stands on a ledge next to an open window in a house.
A girl watching a bird.
We don't know for sure that the girl is watching a bird.
exists e1 s1 x1 x2 x3 x4.(to(e1,x3) & in(x3,x4) & n_house(x4) & n_window(x3) & a_open(s1) & Theme(s1,x3) & r_next(e1) & on(e1,x2) & n_ledge(x2) & Actor(e1,x1) & v_stand(e1) & n_girl(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_watch(e1) & n_bird(x3) & (x1 = x2) & n_girl(x1))