Which parent of a writer of M1 's prequel influenced M0
SELECT DISTINCT ?x0 WHERE {
?x0 ns:influence.influence_node.influenced M0 .
?x0 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child ?x1 .
?x1 ns:film.writer.film ?x2 .
?x2 ns:film.film.sequel M1
}