What child of a film director directed M1 's sequel
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.director.film ?x1 .
?x0 ns:people.person.parents|ns:fictional_universe.fictional_character.parents|ns:organization.organization.parent/ns:organization.organization_relationship.parent ?x2 .
?x1 ns:film.film.prequel M1 .
?x2 a ns:film.director
}