question: Was a Chinese male writer of M1 , M2 , M3 , and M4 a film director
query: SELECT count(*) WHERE {
  ?x0 a ns:film.director .
  ?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.gender ns:m.05zppz .
  ?x0 ns:people.person.nationality ns:m.0d05w3
  }