Was M2 executive produced by M3 and M4 , edited by M1 's Canadian editor , and edited by M5 and M6
SELECT count(*) WHERE {
?x0 ns:film.editor.film M1 .
?x0 ns:people.person.nationality ns:m.0d060g .
M2 ns:film.film.edited_by ?x0 .
M2 ns:film.film.edited_by M5 .
M2 ns:film.film.edited_by M6 .
M2 ns:film.film.executive_produced_by M3 .
M2 ns:film.film.executive_produced_by M4
}