question: Who was a Canadian art director 's parent 's sibling
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:people.person .
  ?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 ?x1 .
  ?x1 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child ?x2 .
  ?x2 a ns:film.film_art_director .
  ?x2 ns:people.person.nationality ns:m.0d060g .
  FILTER ( ?x0 != ?x1 )
  }