Was a prequel of M0 written by and produced by M1 's star
SELECT count(*) WHERE {
?x0 ns:film.film.produced_by|ns:film.film.production_companies ?x1 .
?x0 ns:film.film.sequel M0 .
?x0 ns:film.film.written_by ?x1 .
?x1 ns:film.actor.film/ns:film.performance.film M1
}