Which costume designer of M0 did a art director 's employer employ
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.film_costumer_designer.costume_design_for_film M0 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
?x1 ns:business.employer.employees/ns:business.employment_tenure.person ?x2 .
?x2 a ns:film.film_art_director
}