The rock climbing event is held in a city.
There are fifteen sheep climbing
the climbing event can be for humans and not for fifteen  sheep.
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 p1 x1 e1 x2 x3.((x1 = x2) & Actor(e1,x3) & v_climb(e1) & (x2 = x3) & n_sheep(x2) & card_eq_15(x2))