Did a screenwriter write a film that was edited by and was directed by M2
SELECT count(*) WHERE {
?x0 a ns:film.writer .
?x0 ns:film.writer.film ?x1 .
?x1 a ns:film.film .
?x1 ns:film.film.directed_by M2 .
?x1 ns:film.film.edited_by M2
}