question: Were M2 , M3 , and M4 edited by a film 's editor and directed by a art director
query: SELECT count(*) WHERE {
  ?x0 ns:film.editor.film ?x1 .
  ?x1 a ns:film.film .
  ?x2 a ns:film.film_art_director .
  M2 ns:film.film.directed_by ?x2 .
  M2 ns:film.film.edited_by ?x0 .
  M3 ns:film.film.directed_by ?x2 .
  M3 ns:film.film.edited_by ?x0 .
  M4 ns:film.film.directed_by ?x2 .
  M4 ns:film.film.edited_by ?x0
  }