question: Was a film 's prequel 's cinematographer 's child M0 's writer
query: SELECT count(*) WHERE {
  ?x0 ns:film.writer.film M0 .
  ?x0 ns:people.person.parents|ns:fictional_universe.fictional_character.parents|ns:organization.organization.parent/ns:organization.organization_relationship.parent ?x1 .
  ?x1 ns:film.cinematographer.film ?x2 .
  ?x2 ns:film.film.sequel ?x3 .
  ?x3 a ns:film.film
  }