Two bmx riders racing on a track
There are people sitting outdoors
Two bmx riders cannot sit and  racing simultaneously.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x4) & n_track(x4) & Actor(e1,x3) & v_race(e1) & (x1 = x3) & n_rider(x1) & of(x1,x2) & n_bmx(x2) & card_eq_2(x1))
exists p1 x1 e1 x2 x3 x4.((x1 = x2) & Time(e1,x4) & n_outdoors(x4) & Actor(e1,x3) & v_sit(e1) & (x2 = x3) & n_people(x2))