question: Was M6 a parent of a costume designer of M0 , M1 , M2 , M3 , M4 , and M5
query: SELECT count(*) WHERE {
  ?x0 ns:film.film_costumer_designer.costume_design_for_film M0 .
  ?x0 ns:film.film_costumer_designer.costume_design_for_film M1 .
  ?x0 ns:film.film_costumer_designer.costume_design_for_film M2 .
  ?x0 ns:film.film_costumer_designer.costume_design_for_film M3 .
  ?x0 ns:film.film_costumer_designer.costume_design_for_film M4 .
  ?x0 ns:film.film_costumer_designer.costume_design_for_film M5 .
  M6 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child ?x0
  }