The rock climbing event is held in a city.
There will be many people who attend the climbing event
rock climbing is not the only climbing event , it could be mountain climbing.
exists e1 e2 x1 x2 x3.(n_event(x1) & Actor(e1,x1) & v_climb(e1) & of(x1,x2) & n_rock(x2) & in(e2,x3) & n_city(x3) & Theme(e2,x1) & v_hold(e2))
exists e1 p1 x1 x4.(n_event(x4) & Actor(e1,x4) & v_climb(e1) & exists e2 x2 x3.((x1 = x2) & Theme(e2,x4) & Actor(e2,x3) & v_attend(e2) & (x2 = x3) & n_people(x2) & n_quantity(x2)))