An audience is watching a car race at a racetrack.
The people are watching a charity car race.
Not all car races are a charity race.
exists e1 x1 x2 x3 x4.(at(e1,x4) & n_racetrack(x4) & Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_race(x2) & of(x2,x3) & n_car(x3) & n_audience(x1))
exists e1 x1 x2 x3 x4.(n_people(x1) & Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_race(x2) & of(x2,x4) & n_car(x4) & of(x2,x3) & n_charity(x3))