Four cyclists racing around a bicycle track.
Four runners racing around a racetrack.
One can not be a cyclists and runner simultaneously. One group is on a bicycle track the other a racetrack.
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) & around(e1,x3) & n_racetrack(x3) & Actor(e1,x2) & v_race(e1) & (x1 = x2) & n_runner(x1) & card_eq_4(x1))