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