Who was a character that wrote M2 and executive produced a film
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:fictional_universe.fictional_character .
?x0 a ns:people.person .
?x0 ns:film.producer.films_executive_produced ?x1 .
?x0 ns:film.writer.film M2 .
?x1 a ns:film.film
}