Was a film directed by and executive produced by M1 's prequel 's star
SELECT count(*) WHERE {
?x0 a ns:film.film .
?x0 ns:film.film.directed_by ?x1 .
?x0 ns:film.film.executive_produced_by ?x1 .
?x1 ns:film.actor.film/ns:film.performance.film ?x2 .
?x2 ns:film.film.sequel M1
}