Was a sequel of M0 written by , edited by , and executive produced by a producer of M1
SELECT count(*) WHERE {
?x0 ns:film.film.edited_by ?x1 .
?x0 ns:film.film.executive_produced_by ?x1 .
?x0 ns:film.film.prequel M0 .
?x0 ns:film.film.written_by ?x1 .
?x1 ns:film.producer.film|ns:film.production_company.films M1
}