A man on a dirt bike is flying through the air.
His is in a competition.
We have no idea if he is in a competition or not, he could just be riding.
exists e1 x1 x2 x3 x4.(n_air(x4) & through(e1,x4) & Actor(e1,x1) & v_fly(e1) & on(x1,x2) & n_bike(x2) & of(x2,x3) & n_dirt(x3) & n_man(x1))
exists p1 x1.(exists x2.(in(x1,x2) & n_competition(x2)) & n_his(x1))