Were M2 and M3 written by , edited by , and directed by a German editor of M1
SELECT count(*) WHERE {
?x0 ns:film.editor.film M1 .
?x0 ns:people.person.nationality ns:m.0345h .
M2 ns:film.film.directed_by ?x0 .
M2 ns:film.film.edited_by ?x0 .
M2 ns:film.film.written_by ?x0 .
M3 ns:film.film.directed_by ?x0 .
M3 ns:film.film.edited_by ?x0 .
M3 ns:film.film.written_by ?x0
}