Which executive producer of M0 was a sibling of M2 's German star
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.producer.films_executive_produced M0 .
?x0 ns:people.person.sibling_s/ns:people.sibling_relationship.sibling|ns:fictional_universe.fictional_character.siblings/ns:fictional_universe.sibling_relationship_of_fictional_characters.siblings ?x1 .
?x1 ns:film.actor.film/ns:film.performance.film M2 .
?x1 ns:people.person.nationality ns:m.0345h .
FILTER ( ?x0 != ?x1 )
}