The boy is doing a jump in the air on his bike.
A boy on his bike
All of this information can be deduced from the first sentence, one can deduce a boy is on his bike.
exists e1 x1 x2 x3 x4.(n_bike(x4) & of(x4,x3) & n_male(x3) & n_air(x3) & n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & on(x2,x4) & in(x2,x3) & n_jump(x2))
exists x1 x2.(a_topic(x1) & on(x1,x2) & n_bike(x2) & of(x2,x1) & n_male(x1) & n_boy(x1))