A window washer is cleaning the bookstore windows.
There is a man cleaning windows.
Just because A window washer is cleaning the bookstore windows doesn't mean he is a man.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_clean(e1) & n_window(x2) & n_window(x2) & of(x2,x3) & n_bookstore(x3) & n_washer(x1) & of(x1,x2))
exists p1 x1 x2 x3 x4.((x1 = x2) & n_window(x2) & of(x2,x4) & n_cleaning(x4) & of(x2,x3) & n_man(x3))