What did M0 write and M2 's prequel 's German writer executive produce
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.film.executive_produced_by ?x1 .
?x0 ns:film.film.written_by M0 .
?x1 ns:film.writer.film ?x2 .
?x1 ns:people.person.nationality ns:m.0345h .
?x2 ns:film.film.sequel M2
}