Was M1 M0 's sequel 's executive producer , producer , and writer
SELECT count(*) WHERE {
?x0 ns:film.film.prequel M0 .
M1 ns:film.producer.films_executive_produced ?x0 .
M1 ns:film.producer.film|ns:film.production_company.films ?x0 .
M1 ns:film.writer.film ?x0
}