question: Were M2 and M3 written by a film director 's sibling and executive produced by a editor , executive producer , and writer of M0
query: SELECT count(*) WHERE {
  ?x0 ns:film.editor.film M0 .
  ?x0 ns:film.producer.films_executive_produced M0 .
  ?x0 ns:film.writer.film M0 .
  ?x1 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 ?x2 .
  ?x2 a ns:film.director .
  FILTER ( ?x1 != ?x2 ) .
  M2 ns:film.film.executive_produced_by ?x0 .
  M2 ns:film.film.written_by ?x1 .
  M3 ns:film.film.executive_produced_by ?x0 .
  M3 ns:film.film.written_by ?x1
  }