A person is racing around a dirt track on a yellow dirt bike.
A boy on a dirt bike is in first place.
A person on a dirt track can be an individual other than a boy. Racing on a dirt track does not imply that the person is in first place.
exists e1 s1 x1 x2 x3 x4 x5.(around(e1,x2) & on(x2,x4) & n_bike(x4) & of(x4,x5) & n_dirt(x5) & a_yellow(s1) & Theme(s1,x4) & n_track(x2) & of(x2,x3) & n_dirt(x3) & Actor(e1,x1) & v_race(e1) & n_person(x1))
exists p1 x1 x2 x3.(exists s1 x4.(in(x1,x4) & n_place(x4) & a_first(s1) & Theme(s1,x4)) & on(x1,x2) & n_bike(x2) & of(x2,x3) & n_dirt(x3) & n_boy(x1))