Who executive produced M4 's prequel , directed M3 , wrote M1 , and wrote M2
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:people.person .
?x0 ns:film.director.film M3 .
?x0 ns:film.producer.films_executive_produced ?x1 .
?x0 ns:film.writer.film M1 .
?x0 ns:film.writer.film M2 .
?x1 ns:film.film.sequel M4
}