question: Was M2 written by M3 , executive produced by M0 's producer , and executive produced by M1 's sibling
query: SELECT count(*) WHERE {
  ?x0 ns:film.producer.film|ns:film.production_company.films 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 M1 .
  FILTER ( ?x1 != M1 ) .
  M2 ns:film.film.executive_produced_by ?x0 .
  M2 ns:film.film.executive_produced_by ?x1 .
  M2 ns:film.film.written_by M3
  }