question: What costume designer of M1 and M2 was employed by M0
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.film_costumer_designer.costume_design_for_film M1 .
  ?x0 ns:film.film_costumer_designer.costume_design_for_film M2 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M0
  }