Did a German star of M3 edit M0 and M1
SELECT count(*) WHERE {
?x0 ns:film.actor.film/ns:film.performance.film M3 .
?x0 ns:film.editor.film M0 .
?x0 ns:film.editor.film M1 .
?x0 ns:people.person.nationality ns:m.0345h
}