Was a writer and cinematographer of M1 , M2 , and M3 a film director
SELECT count(*) WHERE {
?x0 a ns:film.director .
?x0 ns:film.cinematographer.film M1 .
?x0 ns:film.cinematographer.film M2 .
?x0 ns:film.cinematographer.film M3 .
?x0 ns:film.writer.film M1 .
?x0 ns:film.writer.film M2 .
?x0 ns:film.writer.film M3
}