question: What German star of M2 , M3 , M4 , and M5 was M0 's executive producer
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.actor.film/ns:film.performance.film M2 .
  ?x0 ns:film.actor.film/ns:film.performance.film M3 .
  ?x0 ns:film.actor.film/ns:film.performance.film M4 .
  ?x0 ns:film.actor.film/ns:film.performance.film M5 .
  ?x0 ns:film.producer.films_executive_produced M0 .
  ?x0 ns:people.person.nationality ns:m.0345h
  }