Four cyclists racing around a bicycle track.
A track with bikers racing on it.
Four cyclists can be truthfully referred to as bikers. A bicycle track is a track.
exists e1 x1 x2 x3 x4.(a_topic(x1) & around(e1,x3) & n_track(x3) & of(x3,x4) & n_bicycle(x4) & Actor(e1,x2) & v_race(e1) & (x1 = x2) & n_cyclist(x1) & card_eq_4(x1))
exists e1 x1 x2 x3.(a_topic(x1) & with(x1,x2) & on(e1,x1) & n_thing(x1) & Actor(e1,x3) & v_race(e1) & (x2 = x3) & n_biker(x2) & n_track(x1))