What was distributed by M0 and distributed by M1 's writer
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.film.distributors/ns:film.film_film_distributor_relationship.distributor ?x1 .
?x0 ns:film.film.distributors/ns:film.film_film_distributor_relationship.distributor M0 .
?x1 ns:film.writer.film M1
}