Which parent of M1 's art director was employed by M0 's employer
SELECT DISTINCT ?x0 WHERE {
?x0 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child ?x1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x2 .
?x1 ns:film.film_art_director.films_art_directed M1 .
?x2 ns:business.employer.employees/ns:business.employment_tenure.person M0
}