question: Did a producer and distributor of M0 distribute M1 's prequel
query: SELECT count(*) WHERE {
  ?x0 ns:film.film_distributor.films_distributed/ns:film.film_film_distributor_relationship.film ?x1 .
  ?x0 ns:film.film_distributor.films_distributed/ns:film.film_film_distributor_relationship.film M0 .
  ?x0 ns:film.producer.film|ns:film.production_company.films M0 .
  ?x1 ns:film.film.sequel M1
  }