Which film director executive produced a film and wrote M1 's prequel
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.director .
?x0 ns:film.producer.films_executive_produced ?x1 .
?x0 ns:film.writer.film ?x2 .
?x1 a ns:film.film .
?x2 ns:film.film.sequel M1
}