A woman mounts a ladder to paint the ceiling.
A woman is on a ladder.
A woman mounts a ladder is not conclusive proof she is on a ladder.
exists e1 p1 x1 x2 x3 x4.(n_ceiling(x4) & Topic(e1,p1) & exists e2.(Theme(e2,x4) & Actor(e2,x1) & v_paint(e2)) & Theme(e1,x3) & Actor(e1,x2) & v_mount(e1) & n_ladder(x3) & n_woman(x2) & n_woman(x1))
exists p1 x1.(exists x2.(on(x1,x2) & n_ladder(x2)) & n_woman(x1))