What prequel of M0 did M1 's producer distribute
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.film.distributors/ns:film.film_film_distributor_relationship.distributor ?x1 .
?x0 ns:film.film.sequel M0 .
?x1 ns:film.producer.film|ns:film.production_company.films M1
}