A young person is doing a trick on a bike.
A boy does a wheelie on his new bike.
A trick does not need to be a wheelie, and their is no mention of the bike being new.
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & on(x2,x3) & n_bike(x3) & n_trick(x2) & n_person(x1) & a_young(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(on(e1,x3) & n_bike(x3) & a_new(s1) & Theme(s1,x3) & of(x3,x1) & n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_wheelie(x2) & n_boy(x1))