question: Did M2 , M3 , M4 , and M5 executive produce a film whose sequel was written by and executive produced by M1
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film .
  ?x0 ns:film.film.sequel ?x1 .
  ?x1 ns:film.film.executive_produced_by M1 .
  ?x1 ns:film.film.written_by M1 .
  M2 ns:film.producer.films_executive_produced ?x0 .
  M3 ns:film.producer.films_executive_produced ?x0 .
  M4 ns:film.producer.films_executive_produced ?x0 .
  M5 ns:film.producer.films_executive_produced ?x0
  }