question: Which Canadian Swedish male child of M3 was M4 's child
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:people.person.gender ns:m.05zppz .
  ?x0 ns:people.person.nationality ns:m.0d060g .
  ?x0 ns:people.person.nationality ns:m.0d0vqn .
  ?x0 ns:people.person.parents|ns:fictional_universe.fictional_character.parents|ns:organization.organization.parent/ns:organization.organization_relationship.parent M3 .
  ?x0 ns:people.person.parents|ns:fictional_universe.fictional_character.parents|ns:organization.organization.parent/ns:organization.organization_relationship.parent M4
  }