question: What was produced by M0 and M1 and produced by a German person that M4 , M5 , and M6 starred
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.film.produced_by|ns:film.film.production_companies ?x1 .
  ?x0 ns:film.film.produced_by|ns:film.film.production_companies M0 .
  ?x0 ns:film.film.produced_by|ns:film.film.production_companies M1 .
  ?x1 a ns:people.person .
  ?x1 ns:film.actor.film/ns:film.performance.film M4 .
  ?x1 ns:film.actor.film/ns:film.performance.film M5 .
  ?x1 ns:film.actor.film/ns:film.performance.film M6 .
  ?x1 ns:people.person.nationality ns:m.0345h
  }