Did M3 star a art director that M2 was founded by and M1 employed
SELECT count(*) WHERE {
?x0 a ns:film.film_art_director .
?x0 ns:organization.organization_founder.organizations_founded M2 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
M3 ns:film.film.starring/ns:film.performance.actor ?x0
}