Did M1 , M2 , M3 , and M4 found a film 's art director 's employer
SELECT count(*) WHERE {
?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
?x1 ns:film.film_art_director.films_art_directed ?x2 .
?x2 a ns:film.film .
M1 ns:organization.organization_founder.organizations_founded ?x0 .
M2 ns:organization.organization_founder.organizations_founded ?x0 .
M3 ns:organization.organization_founder.organizations_founded ?x0 .
M4 ns:organization.organization_founder.organizations_founded ?x0
}