Was a executive producer and writer of M1 , M2 , and M3 a Canadian film producer
SELECT count(*) WHERE {
?x0 a ns:film.producer .
?x0 ns:film.producer.films_executive_produced M1 .
?x0 ns:film.producer.films_executive_produced M2 .
?x0 ns:film.producer.films_executive_produced M3 .
?x0 ns:film.writer.film M1 .
?x0 ns:film.writer.film M2 .
?x0 ns:film.writer.film M3 .
?x0 ns:people.person.nationality ns:m.0d060g
}