Was M3 edited by and written by a Canadian costume designer that M2 starred
SELECT count(*) WHERE {
?x0 a ns:film.film_costumer_designer .
?x0 ns:film.actor.film/ns:film.performance.film M2 .
?x0 ns:people.person.nationality ns:m.0d060g .
M3 ns:film.film.edited_by ?x0 .
M3 ns:film.film.written_by ?x0
}