What Italian film producer was a film 's writer , executive producer , star , and producer
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.actor.film/ns:film.performance.film ?x1 .
?x0 ns:film.producer.films_executive_produced ?x1 .
?x0 ns:film.producer.film|ns:film.production_company.films ?x1 .
?x0 ns:film.writer.film ?x1 .
?x0 ns:people.person.nationality ns:m.03rjj .
?x1 a ns:film.film
}