question: Which film was distributed by M1 , was distributed by M2 , M3 , and M4 , and was distributed by M5 and M6
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.film .
  ?x0 ns:film.film.distributors/ns:film.film_film_distributor_relationship.distributor M1 .
  ?x0 ns:film.film.distributors/ns:film.film_film_distributor_relationship.distributor M2 .
  ?x0 ns:film.film.distributors/ns:film.film_film_distributor_relationship.distributor M3 .
  ?x0 ns:film.film.distributors/ns:film.film_film_distributor_relationship.distributor M4 .
  ?x0 ns:film.film.distributors/ns:film.film_film_distributor_relationship.distributor M5 .
  ?x0 ns:film.film.distributors/ns:film.film_film_distributor_relationship.distributor M6
  }