question: Were M2 and M3 produced and written by a French sibling of M1 's writer and producer
query: SELECT count(*) WHERE {
  ?x0 ns:people.person.nationality ns:m.0f8l9c .
  ?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 ?x1 .
  ?x1 ns:film.producer.film|ns:film.production_company.films M1 .
  ?x1 ns:film.writer.film M1 .
  FILTER ( ?x0 != ?x1 ) .
  M2 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
  M2 ns:film.film.written_by ?x0 .
  M3 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
  M3 ns:film.film.written_by ?x0
  }