question: Was a film that M2 and M3 distributed M0
query: SELECT count(*) WHERE {
  M0 a ns:film.film .
  M0 ns:film.film.distributors/ns:film.film_film_distributor_relationship.distributor M2 .
  M0 ns:film.film.distributors/ns:film.film_film_distributor_relationship.distributor M3
  }