Was a parent of M0 's director M1 's sequel 's editor
SELECT count(*) WHERE {
?x0 ns:film.editor.film ?x1 .
?x0 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child ?x2 .
?x1 ns:film.film.prequel M1 .
?x2 ns:film.director.film M0
}