Was M1 edited by M2 and written by a writer and executive producer of M0 's prequel
SELECT count(*) WHERE {
?x0 ns:film.producer.films_executive_produced ?x1 .
?x0 ns:film.writer.film ?x1 .
?x1 ns:film.film.sequel M0 .
M1 ns:film.film.edited_by M2 .
M1 ns:film.film.written_by ?x0
}