A window washer is cleaning the bookstore windows.
A boy is spraying graffiti on a train car.
Spraying graffiti can not be cleaning while one can not be cleaning bookstore windows while on a train car.
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 e1 x1 x2 x3 x4.(on(e1,x3) & n_car(x3) & of(x3,x4) & n_train(x4) & Theme(e1,x2) & Actor(e1,x1) & v_spray(e1) & n_graffitus(x2) & n_boy(x1))