Was a film written by M3 's Canadian star and edited by M1
SELECT count(*) WHERE {
?x0 a ns:film.film .
?x0 ns:film.film.edited_by M1 .
?x0 ns:film.film.written_by ?x1 .
?x1 ns:film.actor.film/ns:film.performance.film M3 .
?x1 ns:people.person.nationality ns:m.0d060g
}