Did a Canadian cinematographer write M1 and M2 and executive produce M3 and M4
SELECT count(*) WHERE {
?x0 a ns:film.cinematographer .
?x0 ns:film.producer.films_executive_produced M3 .
?x0 ns:film.producer.films_executive_produced M4 .
?x0 ns:film.writer.film M1 .
?x0 ns:film.writer.film M2 .
?x0 ns:people.person.nationality ns:m.0d060g
}