question: Did M1 edit M2 and M3 , produce M4 , and edit a sequel of M0
query: SELECT count(*) WHERE {
  ?x0 ns:film.film.prequel M0 .
  M1 ns:film.editor.film ?x0 .
  M1 ns:film.editor.film M2 .
  M1 ns:film.editor.film M3 .
  M1 ns:film.producer.film|ns:film.production_company.films M4
  }