Was a film directed by M1 , edited by M3 's director , and directed by M2
SELECT count(*) WHERE {
?x0 a ns:film.film .
?x0 ns:film.film.directed_by M1 .
?x0 ns:film.film.directed_by M2 .
?x0 ns:film.film.edited_by ?x1 .
?x1 ns:film.director.film M3
}