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