boy on bike jumping over a sign
The boy is on a bike.
boy on bike is same as boy is on a bike
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(x1,x2) & over(e1,x4) & n_sign(x4) & Actor(e1,x3) & v_jump(e1) & (x2 = x3) & n_bike(x2) & n_boy(x1))
exists p1 x1.(n_boy(x1) & exists x2.(on(x1,x2) & n_bike(x2)))