Was M2 edited by M3 , M4 , and M5 and executive produced by a Canadian screenwriter
SELECT count(*) WHERE {
?x0 a ns:film.writer .
?x0 ns:people.person.nationality ns:m.0d060g .
M2 ns:film.film.edited_by M3 .
M2 ns:film.film.edited_by M4 .
M2 ns:film.film.edited_by M5 .
M2 ns:film.film.executive_produced_by ?x0
}