Which actor of a film producer was a person 's child
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.actor.film/ns:film.performance.character ?x1 .
?x0 ns:people.person.parents|ns:fictional_universe.fictional_character.parents|ns:organization.organization.parent/ns:organization.organization_relationship.parent ?x2 .
?x1 a ns:film.producer .
?x2 a ns:people.person
}