question: Was M2 's prequel 's German executive producer a screenwriter
query: SELECT count(*) WHERE {
  ?x0 a ns:film.writer .
  ?x0 ns:film.producer.films_executive_produced ?x1 .
  ?x0 ns:people.person.nationality ns:m.0345h .
  ?x1 ns:film.film.sequel M2
  }