A girl sitting on a bench.
A girl is sitting on a park bench.
bench almost the same as  park bench
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_bench(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_girl(x1))
exists e1 x1 x2 x3.(on(e1,x2) & n_bench(x2) & of(x2,x3) & n_park(x3) & Actor(e1,x1) & v_sit(e1) & n_girl(x1))