question: Were M2 and M3 directed , produced , and edited by a Canadian art director
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film_art_director .
  ?x0 ns:people.person.nationality ns:m.0d060g .
  M2 ns:film.film.directed_by ?x0 .
  M2 ns:film.film.edited_by ?x0 .
  M2 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
  M3 ns:film.film.directed_by ?x0 .
  M3 ns:film.film.edited_by ?x0 .
  M3 ns:film.film.produced_by|ns:film.film.production_companies ?x0
  }