Boys outside a building.
There are boys standing outside.
A building is usually outside.
exists x1 x2.(a_topic(x1) & outside(x1,x2) & n_building(x2) & n_boy(x1))
exists p1 x1 e1 s1 x2 x3.((x1 = x2) & a_outside(s1) & Manner(e1,s1) & Actor(e1,x3) & v_stand(e1) & (x2 = x3) & n_boy(x2))