Did a Canadian art director executive produce M1 and executive produce M2
SELECT count(*) WHERE {
?x0 a ns:film.film_art_director .
?x0 ns:film.producer.films_executive_produced M1 .
?x0 ns:film.producer.films_executive_produced M2 .
?x0 ns:people.person.nationality ns:m.0d060g
}