A teenage boy on a bicycle is jumping off a ramp.
A cyclist is riding.
boy on a bicycle simply means cyclist is riding
exists e1 s1 s2 x1 x2 x3.(a_off(s2) & Manner(e1,s2) & Theme(e1,x3) & Actor(e1,x1) & v_jump(e1) & n_ramp(x3) & on(x1,x2) & n_bicycle(x2) & n_boy(x1) & a_teenage(s1) & Theme(s1,x1))
exists e1 x1.(Actor(e1,x1) & v_ride(e1) & n_cyclist(x1))