question: Was M2 's German art director a editor and writer of M0
query: SELECT count(*) WHERE {
  ?x0 ns:film.editor.film M0 .
  ?x0 ns:film.film_art_director.films_art_directed M2 .
  ?x0 ns:film.writer.film M0 .
  ?x0 ns:people.person.nationality ns:m.0345h
  }