Were M2 and M3 written by a cinematographer and edited by a writer and director of M1
SELECT count(*) WHERE {
?x0 a ns:film.cinematographer .
?x1 ns:film.director.film M1 .
?x1 ns:film.writer.film M1 .
M2 ns:film.film.edited_by ?x1 .
M2 ns:film.film.written_by ?x0 .
M3 ns:film.film.edited_by ?x1 .
M3 ns:film.film.written_by ?x0
}