question: Were M3 and M4 written by a male Spanish film editor
query: SELECT count(*) WHERE {
  ?x0 a ns:film.editor .
  ?x0 ns:people.person.gender ns:m.05zppz .
  ?x0 ns:people.person.nationality ns:m.06mkj .
  M3 ns:film.film.written_by ?x0 .
  M4 ns:film.film.written_by ?x0
  }