Were M1 and M4 written by M2 and M3 and produced by M0 's sequel 's executive producer and star
SELECT count(*) WHERE {
?x0 ns:film.actor.film/ns:film.performance.film ?x1 .
?x0 ns:film.producer.films_executive_produced ?x1 .
?x1 ns:film.film.prequel M0 .
M1 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
M1 ns:film.film.written_by M2 .
M1 ns:film.film.written_by M3 .
M4 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
M4 ns:film.film.written_by M2 .
M4 ns:film.film.written_by M3
}