a person on a bicycle launching off a dirt ramp on a track.
A person on a bicycle on a track.
in a both sentence ramp and track are not same.
exists e1 s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & on(x1,x2) & a_off(s1) & Manner(e1,s1) & Theme(e1,x4) & Actor(e1,x3) & v_launch(e1) & on(x4,x6) & n_track(x6) & n_ramp(x4) & of(x4,x5) & n_dirt(x5) & (x2 = x3) & n_bicycle(x2) & n_person(x1))
exists x1 x2 x3.(a_topic(x1) & on(x1,x2) & on(x2,x3) & n_track(x3) & n_bicycle(x2) & n_person(x1))