question: Was a art director of M1 , M2 , M3 , M4 , M5 , M6 , and M7 M0
query: SELECT count(*) WHERE {
  M0 ns:film.film_art_director.films_art_directed M1 .
  M0 ns:film.film_art_director.films_art_directed M2 .
  M0 ns:film.film_art_director.films_art_directed M3 .
  M0 ns:film.film_art_director.films_art_directed M4 .
  M0 ns:film.film_art_director.films_art_directed M5 .
  M0 ns:film.film_art_director.films_art_directed M6 .
  M0 ns:film.film_art_director.films_art_directed M7
  }