Pilot dropping cloth while cleaning airplane windows.
A women sweeps the floor.
You cannot sweep and clean the airplane windows at the same time.
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.(n_floor(x2) & Theme(e1,x2) & Actor(e1,x1) & v_sweep(e1) & n_woman(x1))