question: Which costume designer was M1 's producer 's employee
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.film_costumer_designer .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
  ?x1 ns:film.producer.film|ns:film.production_company.films M1
  }