question: Were M5 and M6 edited by a female Canadian screenwriter that directed M4 and edited M1
query: SELECT count(*) WHERE {
  ?x0 a ns:film.writer .
  ?x0 ns:film.director.film M4 .
  ?x0 ns:film.editor.film M1 .
  ?x0 ns:people.person.gender ns:m.02zsn .
  ?x0 ns:people.person.nationality ns:m.0d060g .
  M5 ns:film.film.edited_by ?x0 .
  M6 ns:film.film.edited_by ?x0
  }