question: Was a Chinese film director that M3 and M4 were produced by a film producer
query: SELECT count(*) WHERE {
  ?x0 a ns:film.director .
  ?x0 a ns:film.producer .
  ?x0 ns:film.producer.film|ns:film.production_company.films M3 .
  ?x0 ns:film.producer.film|ns:film.production_company.films M4 .
  ?x0 ns:people.person.nationality ns:m.0d05w3
  }