A man is on a horse in front of an audience.
A man is in a circus.
The man on a horse could be somewhere other in a circus.
exists p1 x1.(exists x2 x3 x4.(on(x1,x2) & in(x2,x3) & of(x3,x4) & n_audience(x4) & n_front(x3) & n_horse(x2)) & n_man(x1))
exists p1 x1.(exists x2.(in(x1,x2) & n_circus(x2)) & n_man(x1))