What did a film 's distributor and producer write
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.film.written_by ?x1 .
?x1 ns:film.film_distributor.films_distributed/ns:film.film_film_distributor_relationship.film ?x2 .
?x1 ns:film.producer.film|ns:film.production_company.films ?x2 .
?x2 a ns:film.film
}