question: Was a costume designer employed by M1 , employed by M2 , and employed by M3 and M4
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film_costumer_designer .
  ?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
  }