question: Were M2 and M6 edited by M0 's American sibling , written by M3 , and written by M4 and M5
query: SELECT count(*) WHERE {
  ?x0 ns:people.person.nationality ns:m.09c7w0 .
  ?x0 ns:people.person.sibling_s/ns:people.sibling_relationship.sibling|ns:fictional_universe.fictional_character.siblings/ns:fictional_universe.sibling_relationship_of_fictional_characters.siblings M0 .
  FILTER ( ?x0 != M0 ) .
  M2 ns:film.film.edited_by ?x0 .
  M2 ns:film.film.written_by M3 .
  M2 ns:film.film.written_by M4 .
  M2 ns:film.film.written_by M5 .
  M6 ns:film.film.edited_by ?x0 .
  M6 ns:film.film.written_by M3 .
  M6 ns:film.film.written_by M4 .
  M6 ns:film.film.written_by M5
  }