Were M2 , M3 , and M4 founded by a costume designer that M1 employed
SELECT count(*) WHERE {
?x0 a ns:film.film_costumer_designer .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
M2 ns:organization.organization.founders ?x0 .
M3 ns:organization.organization.founders ?x0 .
M4 ns:organization.organization.founders ?x0
}