question: Did a Chinese screenwriter that directed M4 play M2 and play M3
query: SELECT count(*) WHERE {
  ?x0 a ns:film.writer .
  ?x0 ns:film.actor.film/ns:film.performance.character M2 .
  ?x0 ns:film.actor.film/ns:film.performance.character M3 .
  ?x0 ns:film.director.film M4 .
  ?x0 ns:people.person.nationality ns:m.0d05w3
  }