Which Canadian film producer that M3 was produced by did M1 employ
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.producer .
?x0 ns:film.producer.film|ns:film.production_company.films M3 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
?x0 ns:people.person.nationality ns:m.0d060g
}