A man standing on some scaffolding is trying to position a ladder.
A man is re-positioning a ladder while standing on a platform.
Man standing on some scaffolding is a type of man, and positioning a ladder is trying to position a ladder.
exists e1 e2 p1 x1 x2 x3.(Topic(e2,p1) & Actor(e2,x1) & v_try(e2) & exists e3 x4.(Theme(e3,x4) & Actor(e3,x1) & v_position(e3) & n_ladder(x4)) & on(e1,x3) & n_scaffolding(x3) & Actor(e1,x2) & v_stand(e1) & (x1 = x2) & n_man(x1))
exists e1 e2 x1 x2 x3.(while(e1,e2) & on(e2,x3) & n_platform(x3) & Actor(e2,x1) & v_stand(e2) & Theme(e1,x2) & Actor(e1,x1) & v_re-position(e1) & n_ladder(x2) & n_man(x1))