question: Were M2 and M5 edited by M3 and M4 , edited by a film editor , and directed by a film 's editor
query: SELECT count(*) WHERE {
  ?x0 a ns:film.editor .
  ?x1 ns:film.editor.film ?x2 .
  ?x2 a ns:film.film .
  M2 ns:film.film.directed_by ?x1 .
  M2 ns:film.film.edited_by ?x0 .
  M2 ns:film.film.edited_by M3 .
  M2 ns:film.film.edited_by M4 .
  M5 ns:film.film.directed_by ?x1 .
  M5 ns:film.film.edited_by ?x0 .
  M5 ns:film.film.edited_by M3 .
  M5 ns:film.film.edited_by M4
  }