Which Canadian writer of M3 edited M0 and edited M1 and M2
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.editor.film M0 .
?x0 ns:film.editor.film M1 .
?x0 ns:film.editor.film M2 .
?x0 ns:film.writer.film M3 .
?x0 ns:people.person.nationality ns:m.0d060g
}