question: Were M3 and M4 edited and written by a Mexican Spanish film director
query: SELECT count(*) WHERE {
  ?x0 a ns:film.director .
  ?x0 ns:people.person.nationality ns:m.06mkj .
  ?x0 ns:people.person.nationality ns:m.0b90_r .
  M3 ns:film.film.edited_by ?x0 .
  M3 ns:film.film.written_by ?x0 .
  M4 ns:film.film.edited_by ?x0 .
  M4 ns:film.film.written_by ?x0
  }