Pilot dropping cloth while cleaning airplane windows.
A man cleans a plane
Just because the pilot is cleaning airplane windows, does not mean he is planning to clean the whole plane.
exists e2 e1 x1 x2 x3 x4 x5.(a_topic(x1) & while(e1,e2) & Theme(e2,x4) & Actor(e2,x2) & v_clean(e2) & n_window(x4) & of(x4,x5) & n_airplane(x5) & Theme(e1,x3) & Actor(e1,x2) & v_drop(e1) & n_cloth(x3) & (x1 = x2) & n_pilot(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_clean(e1) & n_plane(x2) & n_man(x1))