question: Was M6 produced and edited by a Chinese screenwriter that M1 , M2 , M3 , and M4 were written by
query: SELECT count(*) WHERE {
  ?x0 a ns:film.writer .
  ?x0 ns:film.writer.film M1 .
  ?x0 ns:film.writer.film M2 .
  ?x0 ns:film.writer.film M3 .
  ?x0 ns:film.writer.film M4 .
  ?x0 ns:people.person.nationality ns:m.0d05w3 .
  M6 ns:film.film.edited_by ?x0 .
  M6 ns:film.film.produced_by|ns:film.film.production_companies ?x0
  }