question: Was a film that M3 produced and M2 executive produced M0 's prequel
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film .
  ?x0 ns:film.film.executive_produced_by M2 .
  ?x0 ns:film.film.produced_by|ns:film.film.production_companies M3 .
  ?x0 ns:film.film.sequel M0
  }