Was a star and executive producer of M1 's prequel M0 's writer
SELECT count(*) WHERE {
?x0 ns:film.actor.film/ns:film.performance.film ?x1 .
?x0 ns:film.producer.films_executive_produced ?x1 .
?x0 ns:film.writer.film M0 .
?x1 ns:film.film.sequel M1
}