Did M3 's German art director play M1 and M2
SELECT count(*) WHERE {
?x0 ns:film.actor.film/ns:film.performance.character M1 .
?x0 ns:film.actor.film/ns:film.performance.character M2 .
?x0 ns:film.film_art_director.films_art_directed M3 .
?x0 ns:people.person.nationality ns:m.0345h
}