question: Who was a Dutch film producer 's German parent
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:people.person .
  ?x0 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child ?x1 .
  ?x0 ns:people.person.nationality ns:m.0345h .
  ?x1 a ns:film.producer .
  ?x1 ns:people.person.nationality ns:m.059j2
  }