question: Which costume designer of M1 and M2 did M3 's child employ and M0 employ
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 ?x1 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M0 .
  ?x1 ns:people.person.parents|ns:fictional_universe.fictional_character.parents|ns:organization.organization.parent/ns:organization.organization_relationship.parent M3
  }