What was written by and directed by a art director that directed M1 and M2
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.film.directed_by ?x1 .
?x0 ns:film.film.written_by ?x1 .
?x1 a ns:film.film_art_director .
?x1 ns:film.director.film M1 .
?x1 ns:film.director.film M2
}