question: Did a German film director produce , direct , and edit M1 's sequel
query: SELECT count(*) WHERE {
  ?x0 ns:film.director.film ?x1 .
  ?x0 ns:film.editor.film ?x1 .
  ?x0 ns:film.producer.film|ns:film.production_company.films ?x1 .
  ?x0 ns:people.person.nationality ns:m.0345h .
  ?x1 ns:film.film.prequel M1
  }