Several people running a race.
Many people in a race.
If several people are running the event, then many people are in the race.
exists e1 s1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_run(e1) & n_race(x3) & (x1 = x2) & n_people(x1) & a_several(s1) & Theme(s1,x1))
exists x1 x2.(a_topic(x1) & in(x1,x2) & n_race(x2) & n_people(x1) & n_quantity(x1))