A boy on a bike jumping.
Boy jumping
boy jumping is the most simplified description
exists e1 x1 x2 x3.(a_topic(x1) & on(x1,x2) & Actor(e1,x3) & v_jump(e1) & (x2 = x3) & n_bike(x2) & n_boy(x1))
exists e1 x1.(ne_nam_boy(x1) & Actor(e1,x1) & v_jump(e1))