People stand on a drag strip preparing for a race.
There is no people.
There cannot be a single condition of people and no people.
exists e1 e2 x1 x2 x3 x4 x5.(on(e1,x2) & for(e2,x5) & n_race(x5) & Actor(e2,x4) & v_prepare(e2) & (x2 = x4) & n_strip(x2) & of(x2,x3) & n_drag(x3) & Actor(e1,x1) & v_stand(e1) & n_people(x1))
exists p1 x1.-exists x2.((x1 = x2) & n_people(x2))