question: What was directed by M0 and executive produced by a German film director
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.film.directed_by M0 .
  ?x0 ns:film.film.executive_produced_by ?x1 .
  ?x1 a ns:film.director .
  ?x1 ns:people.person.nationality ns:m.0345h
  }