Was a film distributed by M1 , M2 , and M3
SELECT count(*) 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
}