Many people are running in a race.
The racers are wearing jerseys.
Not all people are wearing jerseys.
exists e1 x1 x2.(in(e1,x2) & n_race(x2) & Actor(e1,x1) & v_run(e1) & n_people(x1) & n_quantity(x1))
exists e1 x1 x2.(n_racer(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_jersey(x2))