What film that M5 and M6 directed was distributed by M1 and M2 and was distributed by M3 and M4
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.film .
?x0 ns:film.film.directed_by M5 .
?x0 ns:film.film.directed_by M6 .
?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
}