question: Which film producer was a German parent of M2 's director
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.producer .
  ?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 ns:film.director.film M2
  }