Who was a Canadian film editor that M2 , M3 , and M4 were directed by and written by
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.editor .
?x0 a ns:people.person .
?x0 ns:film.director.film M2 .
?x0 ns:film.director.film M3 .
?x0 ns:film.director.film M4 .
?x0 ns:film.writer.film M2 .
?x0 ns:film.writer.film M3 .
?x0 ns:film.writer.film M4 .
?x0 ns:people.person.nationality ns:m.0d060g
}