A man swinging on the monkey bars
the man was on a airplane
One cannot be on the monkey bars and a airplane at the same time.
exists e1 x1 x2 x3 x4.(n_bar(x3) & of(x3,x4) & n_monkey(x4) & a_topic(x1) & on(e1,x3) & Actor(e1,x2) & v_swing(e1) & (x1 = x2) & n_man(x1))
exists p1 x1.(n_man(x1) & exists x2.(on(x1,x2) & n_airplane(x2)))