question: Were M3 and M6 executive produced by M4 and M5 and executive produced by M2 's German American producer
query: SELECT count(*) WHERE {
  ?x0 ns:film.producer.film|ns:film.production_company.films M2 .
  ?x0 ns:people.person.nationality ns:m.0345h .
  ?x0 ns:people.person.nationality ns:m.09c7w0 .
  M3 ns:film.film.executive_produced_by ?x0 .
  M3 ns:film.film.executive_produced_by M4 .
  M3 ns:film.film.executive_produced_by M5 .
  M6 ns:film.film.executive_produced_by ?x0 .
  M6 ns:film.film.executive_produced_by M4 .
  M6 ns:film.film.executive_produced_by M5
  }