Two motorcycles race on a track.
Motorcycles are on a track.,
A track is for a race.
exists x1 x2 x3.(a_topic(x1) & on(x1,x3) & n_track(x3) & n_race(x1) & of(x1,x2) & n_motorcycle(x2) & card_eq_2(x1))
exists p1 x1.(exists x2.(on(x1,x2) & n_track.(x2)) & n_motorcycle(x1))