question: Which male German screenwriter directed and edited M1
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.writer .
  ?x0 ns:film.director.film M1 .
  ?x0 ns:film.editor.film M1 .
  ?x0 ns:people.person.gender ns:m.05zppz .
  ?x0 ns:people.person.nationality ns:m.0345h
  }