question: Was a German art director , writer , cinematographer , and editor of M1 a person
query: SELECT count(*) WHERE {
  ?x0 a ns:people.person .
  ?x0 ns:film.cinematographer.film M1 .
  ?x0 ns:film.editor.film M1 .
  ?x0 ns:film.film_art_director.films_art_directed M1 .
  ?x0 ns:film.writer.film M1 .
  ?x0 ns:people.person.nationality ns:m.0345h
  }