A young man leaps in the air while playing basketball.
A young man attempts to dunk the basketball in the game.
He may leap for some other reason that attempting to dunk.  He may be practicing and not in a game.
(x)
exists p1 s1 x1 x2 x3 x4.(n_game(x4) & n_basketball(x3) & a_topic(x1) & Topic(x1,p1) & exists e1.(in(e1,x4) & Theme(e1,x3) & Actor(e1,x1) & v_dunk(e1)) & n_attempt(x1) & of(x1,x2) & n_man(x2) & a_young(s1) & Theme(s1,x1))