question: Was M2 's sequel distributed by M0 and M1
query: SELECT count(*) WHERE {
  ?x0 ns:film.film.distributors/ns:film.film_film_distributor_relationship.distributor M0 .
  ?x0 ns:film.film.distributors/ns:film.film_film_distributor_relationship.distributor M1 .
  ?x0 ns:film.film.prequel M2
  }