Was M1 a film producer that a sequel of M0 starred and M3 starred
SELECT count(*) WHERE {
?x0 ns:film.film.prequel M0 .
M1 a ns:film.producer .
M1 ns:film.actor.film/ns:film.performance.film ?x0 .
M1 ns:film.actor.film/ns:film.performance.film M3
}