Did M1 and M2 star M0 's prequel 's editor and director
SELECT count(*) WHERE {
?x0 ns:film.director.film ?x1 .
?x0 ns:film.editor.film ?x1 .
?x1 ns:film.film.sequel M0 .
M1 ns:film.film.starring/ns:film.performance.actor ?x0 .
M2 ns:film.film.starring/ns:film.performance.actor ?x0
}