Man standing on a bike downtown.
It is his bike.
If a man has a bike, it is not necessarily his.
exists x1 x2 x3 x4.(a_topic(x1) & on(x1,x3) & n_downtown(x3) & of(x3,x4) & n_bike(x4) & n_standing(x1) & of(x1,x2) & n_man(x2))
exists p1 x1 x2.(n_bike(x2) & of(x2,x1) & n_male(x1) & n_thing(x1) & (x1 = x2))