question: What costume designer of M1 was M0 's sibling
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.film_costumer_designer.costume_design_for_film M1 .
  ?x0 ns:people.person.sibling_s/ns:people.sibling_relationship.sibling|ns:fictional_universe.fictional_character.siblings/ns:fictional_universe.sibling_relationship_of_fictional_characters.siblings M0 .
  FILTER ( ?x0 != M0 )
  }