A teenage boy does tricks on his bicycle.
The boy is on a bike.
teenage boy is the same as a boy because they are young male who have not become adult.
exists e1 x1 x2 x3 x4.(on(e1,x4) & n_bicycle(x4) & of(x4,x1) & n_male(x1) & Theme(e1,x3) & Actor(e1,x1) & v_do(e1) & n_trick(x3) & n_boy(x1) & of(x1,x2) & n_teenage(x2))
exists p1 x1.(n_boy(x1) & exists x2.(on(x1,x2) & n_bike(x2)))