question: Was a prequel of M0 executive produced by M1 , M2 , and M3 and edited by a actor
query: SELECT count(*) WHERE {
  ?x0 ns:film.film.edited_by ?x1 .
  ?x0 ns:film.film.executive_produced_by M1 .
  ?x0 ns:film.film.executive_produced_by M2 .
  ?x0 ns:film.film.executive_produced_by M3 .
  ?x0 ns:film.film.sequel M0 .
  ?x1 a ns:film.actor
  }