question: Was a sequel of a film directed and produced by M0
query: SELECT count(*) WHERE {
  ?x0 ns:film.film.directed_by M0 .
  ?x0 ns:film.film.prequel ?x1 .
  ?x0 ns:film.film.produced_by|ns:film.film.production_companies M0 .
  ?x1 a ns:film.film
  }