question: Was M3 written by a distributor of M0 , M1 , and M2
query: SELECT count(*) WHERE {
  ?x0 ns:film.film_distributor.films_distributed/ns:film.film_film_distributor_relationship.film M0 .
  ?x0 ns:film.film_distributor.films_distributed/ns:film.film_film_distributor_relationship.film M1 .
  ?x0 ns:film.film_distributor.films_distributed/ns:film.film_film_distributor_relationship.film M2 .
  M3 ns:film.film.written_by ?x0
  }