question: What film producer was a male French German actor
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.actor .
  ?x0 a ns:film.producer .
  ?x0 ns:people.person.gender ns:m.05zppz .
  ?x0 ns:people.person.nationality ns:m.0345h .
  ?x0 ns:people.person.nationality ns:m.0f8l9c
  }