Was a costume designer of M5 and M6 employed by M0 , employed by M1 , M2 , and M3 , and employed by M4
SELECT count(*) WHERE {
?x0 ns:film.film_costumer_designer.costume_design_for_film M5 .
?x0 ns:film.film_costumer_designer.costume_design_for_film M6 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M0 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M3 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M4
}