A teenage boy climbs an indoor climbing wall.
A boy is inside a building.
If the climbing wall is indoor, it must be inside a building.
exists e2 e1 s1 x1 x2 x3.(Theme(e2,x3) & Actor(e2,x1) & v_climb(e2) & n_wall(x3) & Actor(e1,x3) & v_climb(e1) & a_indoor(s1) & Theme(s1,x3) & n_boy(x1) & of(x1,x2) & n_teenage(x2))
exists p1 x1.(exists x2.(inside(x1,x2) & n_building(x2)) & n_boy(x1))