Did a art director edit M1 , M2 , M3 , and M4 and executive produce M5 's prequel
SELECT count(*) WHERE {
?x0 a ns:film.film_art_director .
?x0 ns:film.editor.film M1 .
?x0 ns:film.editor.film M2 .
?x0 ns:film.editor.film M3 .
?x0 ns:film.editor.film M4 .
?x0 ns:film.producer.films_executive_produced ?x1 .
?x1 ns:film.film.sequel M5
}