question: Was a German male editor of M3 and M4 a screenwriter
query: SELECT count(*) WHERE {
  ?x0 a ns:film.writer .
  ?x0 ns:film.editor.film M3 .
  ?x0 ns:film.editor.film M4 .
  ?x0 ns:people.person.gender ns:m.05zppz .
  ?x0 ns:people.person.nationality ns:m.0345h
  }