Were M2 and M3 directed by a Canadian film director and edited by a film director
SELECT count(*) WHERE {
?x0 a ns:film.director .
?x1 a ns:film.director .
?x1 ns:people.person.nationality ns:m.0d060g .
M2 ns:film.film.directed_by ?x1 .
M2 ns:film.film.edited_by ?x0 .
M3 ns:film.film.directed_by ?x1 .
M3 ns:film.film.edited_by ?x0
}