Was a prequel of M0 produced , executive produced , and written by M1 's star and editor
SELECT count(*) WHERE {
?x0 ns:film.film.executive_produced_by ?x1 .
?x0 ns:film.film.produced_by|ns:film.film.production_companies ?x1 .
?x0 ns:film.film.sequel M0 .
?x0 ns:film.film.written_by ?x1 .
?x1 ns:film.actor.film/ns:film.performance.film M1 .
?x1 ns:film.editor.film M1
}