question: Were M2 and M4 distributed by a distributor of M0 and M1 and distributed by M3
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 .
  M2 ns:film.film.distributors/ns:film.film_film_distributor_relationship.distributor ?x0 .
  M2 ns:film.film.distributors/ns:film.film_film_distributor_relationship.distributor M3 .
  M4 ns:film.film.distributors/ns:film.film_film_distributor_relationship.distributor ?x0 .
  M4 ns:film.film.distributors/ns:film.film_film_distributor_relationship.distributor M3
  }