Which Canadian film producer whose child produced M5 executive produced M1 , M2 , and M3
SELECT DISTINCT ?x0 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:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child ?x1 .
?x0 ns:people.person.nationality ns:m.0d060g .
?x1 ns:film.producer.film|ns:film.production_company.films M5
}