question: Was M0 's sequel written and produced by a child of M1
query: SELECT count(*) WHERE {
  ?x0 ns:film.film.prequel M0 .
  ?x0 ns:film.film.produced_by|ns:film.film.production_companies ?x1 .
  ?x0 ns:film.film.written_by ?x1 .
  ?x1 ns:people.person.parents|ns:fictional_universe.fictional_character.parents|ns:organization.organization.parent/ns:organization.organization_relationship.parent M1
  }