question: Did M3 and M6 star M4 , star M5 , and star a Chinese male film director
query: SELECT count(*) WHERE {
  ?x0 a ns:film.director .
  ?x0 ns:people.person.gender ns:m.05zppz .
  ?x0 ns:people.person.nationality ns:m.0d05w3 .
  M3 ns:film.film.starring/ns:film.performance.actor ?x0 .
  M3 ns:film.film.starring/ns:film.performance.actor M4 .
  M3 ns:film.film.starring/ns:film.performance.actor M5 .
  M6 ns:film.film.starring/ns:film.performance.actor ?x0 .
  M6 ns:film.film.starring/ns:film.performance.actor M4 .
  M6 ns:film.film.starring/ns:film.performance.actor M5
  }