Was M1 's director 's employer a costume designer 's employer
SELECT count(*) WHERE {
?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x2 .
?x1 a ns:film.film_costumer_designer .
?x2 ns:film.director.film M1
}