Did a editor and art director of M2 's sequel edit M0 and M1
SELECT count(*) WHERE {
?x0 ns:film.editor.film ?x1 .
?x0 ns:film.editor.film M0 .
?x0 ns:film.editor.film M1 .
?x0 ns:film.film_art_director.films_art_directed ?x1 .
?x1 ns:film.film.prequel M2
}