Was M1 executive produced by a producer of M0 's prequel and written by M2
SELECT count(*) WHERE {
?x0 ns:film.producer.film|ns:film.production_company.films ?x1 .
?x1 ns:film.film.sequel M0 .
M1 ns:film.film.executive_produced_by ?x0 .
M1 ns:film.film.written_by M2
}