Was M3 influenced by a Canadian screenwriter and influenced by a art director
SELECT count(*) WHERE {
?x0 a ns:film.film_art_director .
?x1 a ns:film.writer .
?x1 ns:people.person.nationality ns:m.0d060g .
M3 ns:influence.influence_node.influenced_by ?x0 .
M3 ns:influence.influence_node.influenced_by ?x1
}