Did M1 employ M2 , employ M3 , and employ a costume designer of M0
SELECT count(*) WHERE {
?x0 ns:film.film_costumer_designer.costume_design_for_film M0 .
M1 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M1 ns:business.employer.employees/ns:business.employment_tenure.person M2 .
M1 ns:business.employer.employees/ns:business.employment_tenure.person M3
}