question: Did a Chinese actor edit and write M1 and M2
query: SELECT count(*) WHERE {
  ?x0 a ns:film.actor .
  ?x0 ns:film.editor.film M1 .
  ?x0 ns:film.editor.film M2 .
  ?x0 ns:film.writer.film M1 .
  ?x0 ns:film.writer.film M2 .
  ?x0 ns:people.person.nationality ns:m.0d05w3
  }