A boy on a bike is doing a stunt high in the air.
A boy is riding a bike.
Have to be on a bike to be riding
exists e1 x1 x2 x3 x4 x5.(n_air(x5) & Theme(e1,x3) & Actor(e1,x1) & v_do(e1) & in(x3,x5) & n_high(x3) & of(x3,x4) & n_stunt(x4) & on(x1,x2) & n_bike(x2) & n_boy(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & n_boy(x1))