Were M2 and M4 edited by a film director , directed by a star and editor of M1 , and edited by M3
SELECT count(*) WHERE {
?x0 a ns:film.director .
?x1 ns:film.actor.film/ns:film.performance.film M1 .
?x1 ns:film.editor.film M1 .
M2 ns:film.film.directed_by ?x1 .
M2 ns:film.film.edited_by ?x0 .
M2 ns:film.film.edited_by M3 .
M4 ns:film.film.directed_by ?x1 .
M4 ns:film.film.edited_by ?x0 .
M4 ns:film.film.edited_by M3
}