A man on a scaffold is reaching for an extended ladder.
He is climbing up.
On a scaffold implies climbing up.
exists e1 s1 x1 x2 x3.(for(e1,x3) & n_ladder(x3) & a_extended(s1) & Theme(s1,x3) & Actor(e1,x1) & v_reach(e1) & on(x1,x2) & n_scaffold(x2) & n_man(x1))
exists e1 s1 x1.(n_male(x1) & a_up(s1) & Manner(e1,s1) & Actor(e1,x1) & v_climb(e1))