Were M1 and M2 produced by a art director , director , and editor of M0 's sequel
SELECT count(*) WHERE {
?x0 ns:film.director.film ?x1 .
?x0 ns:film.editor.film ?x1 .
?x0 ns:film.film_art_director.films_art_directed ?x1 .
?x1 ns:film.film.prequel M0 .
M1 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
M2 ns:film.film.produced_by|ns:film.film.production_companies ?x0
}