Was M0 's prequel directed by M1 and produced by a film distributor
SELECT count(*) WHERE {
?x0 ns:film.film.directed_by M1 .
?x0 ns:film.film.produced_by|ns:film.film.production_companies ?x1 .
?x0 ns:film.film.sequel M0 .
?x1 a ns:film.film_distributor
}