Who executive produced a film and directed M2 's prequel
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:people.person .
?x0 ns:film.director.film ?x1 .
?x0 ns:film.producer.films_executive_produced ?x2 .
?x1 ns:film.film.sequel M2 .
?x2 a ns:film.film
}