Which executive producer of M1 was a actor that a film was executive produced by and starred
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.actor .
?x0 ns:film.actor.film/ns:film.performance.film ?x1 .
?x0 ns:film.producer.films_executive_produced ?x1 .
?x0 ns:film.producer.films_executive_produced M1 .
?x1 a ns:film.film
}