question: Was M2 edited by M6 , written by M3 , M4 , and M5 , and written by M1 's Chinese star
query: SELECT count(*) WHERE {
  ?x0 ns:film.actor.film/ns:film.performance.film M1 .
  ?x0 ns:people.person.nationality ns:m.0d05w3 .
  M2 ns:film.film.edited_by M6 .
  M2 ns:film.film.written_by ?x0 .
  M2 ns:film.film.written_by M3 .
  M2 ns:film.film.written_by M4 .
  M2 ns:film.film.written_by M5
  }