question: Were M3 , M4 , M5 , and M6 edited by a female British film editor
query: SELECT count(*) WHERE {
  ?x0 a ns:film.editor .
  ?x0 ns:people.person.gender ns:m.02zsn .
  ?x0 ns:people.person.nationality ns:m.07ssc .
  M3 ns:film.film.edited_by ?x0 .
  M4 ns:film.film.edited_by ?x0 .
  M5 ns:film.film.edited_by ?x0 .
  M6 ns:film.film.edited_by ?x0
  }