Two men working on a scaffold.
The men on the scaffold are cleaning windows.
scaffold doesn't always mean cleaning windows
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_scaffold(x3) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(n_scaffold(x2) & n_man(x1) & Theme(e1,x3) & Actor(e1,x1) & v_clean(e1) & n_window(x3) & on(x1,x2))