People are on a ledge outside of a building.
People are getting ready to jump off the ledge.
The people might be sitting, rather than getting ready to jump off.
exists p1 x1.(exists x2 x3 x4.(on(x1,x2) & of(x3,x4) & n_building(x4) & outside(x2,x3) & n_thing(x3) & n_ledge(x2)) & n_people(x1))
exists e1 p1 x1 x2.(n_ledge(x2) & exists p2 s1.(Topic(s1,p2) & Actor(s1,x1) & a_ready(s1) & exists e2 s2.(a_off(s2) & Manner(e2,s2) & Theme(e2,x2) & Actor(e2,x1) & v_jump(e2))) & Topic(e1,p1) & Actor(e1,x1) & v_get(e1) & n_people(x1))