An athlete races down the track in his bike.
A person is riding a bike.
If the athlete races in his bike he is considered to be riding it.
exists s1 x1 x2 x3.(n_bike(x3) & of(x3,x2) & n_male(x2) & n_track(x2) & a_topic(x1) & down(x1,x2) & in(x2,x3) & n_race(x1) & a_athlete(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & n_person(x1))