Was M2 a German film director whose child directed M0 and M1
SELECT count(*) WHERE {
?x0 ns:film.director.film M0 .
?x0 ns:film.director.film M1 .
M2 a ns:film.director .
M2 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child ?x0 .
M2 ns:people.person.nationality ns:m.0345h
}