Did a star and editor of M1 's prequel play M0
SELECT count(*) WHERE {
?x0 ns:film.actor.film/ns:film.performance.character M0 .
?x0 ns:film.actor.film/ns:film.performance.film ?x1 .
?x0 ns:film.editor.film ?x1 .
?x1 ns:film.film.sequel M1
}