Who distributed M1 , produced a film , and distributed M2
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:people.person .
?x0 ns:film.film_distributor.films_distributed/ns:film.film_film_distributor_relationship.film M1 .
?x0 ns:film.film_distributor.films_distributed/ns:film.film_film_distributor_relationship.film M2 .
?x0 ns:film.producer.film|ns:film.production_company.films ?x1 .
?x1 a ns:film.film
}