question: Were M3 and M4 directed by a director of M1 and M2 and written by M0 's art director and director
query: SELECT count(*) WHERE {
  ?x0 ns:film.director.film M0 .
  ?x0 ns:film.film_art_director.films_art_directed M0 .
  ?x1 ns:film.director.film M1 .
  ?x1 ns:film.director.film M2 .
  M3 ns:film.film.directed_by ?x1 .
  M3 ns:film.film.written_by ?x0 .
  M4 ns:film.film.directed_by ?x1 .
  M4 ns:film.film.written_by ?x0
  }