Was a sequel of M2 directed by M3 's executive producer and executive produced by M0 and M1
SELECT count(*) WHERE {
?x0 ns:film.film.directed_by ?x1 .
?x0 ns:film.film.executive_produced_by M0 .
?x0 ns:film.film.executive_produced_by M1 .
?x0 ns:film.film.prequel M2 .
?x1 ns:film.producer.films_executive_produced M3
}