Was a Canadian screenwriter that directed M3 and M4 a film editor
SELECT count(*) WHERE {
?x0 a ns:film.editor .
?x0 a ns:film.writer .
?x0 ns:film.director.film M3 .
?x0 ns:film.director.film M4 .
?x0 ns:people.person.nationality ns:m.0d060g
}