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