What did a executive producer of M0 executive produce and a art director executive produce
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.film.executive_produced_by ?x1 .
?x0 ns:film.film.executive_produced_by ?x2 .
?x1 ns:film.producer.films_executive_produced M0 .
?x2 a ns:film.film_art_director
}