A whole lot of people are about to start a race or organized walk of some sort.
There is about to be an event.
A race or organized walk is an event.
exists p1 s1 s2 x1 x2.(Topic(s2,p1) & Actor(s2,x1) & a_about(s2) & exists e1 x3 x4.(Theme(e1,x3) & Actor(e1,x1) & v_start(e1) & of(x3,x4) & n_sort(x4) & (n_race(x3) | exists e2.(n_walk(x3) & Theme(e2,x3) & v_organize(e2)))) & of(x1,x2) & n_people(x2) & n_lot(x1) & a_whole(s1) & Theme(s1,x1))
exists p1 p2 s1 x1 x2.(Topic(p1,p2) & exists p3 x4.((x1 = x4) & n_event(x4)) & a_about(s1) & Manner(p1,s1) & exists x3.((x2 = x3) & n_thing(x3)))