Who was a art director that wrote M2 , M3 , M4 , and M5 and executive produced M6
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.film_art_director .
?x0 a ns:people.person .
?x0 ns:film.producer.films_executive_produced M6 .
?x0 ns:film.writer.film M2 .
?x0 ns:film.writer.film M3 .
?x0 ns:film.writer.film M4 .
?x0 ns:film.writer.film M5
}