question: Did M5 produce and executive produce a film that M1 , M2 , M3 , and M4 wrote
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film .
  ?x0 ns:film.film.written_by M1 .
  ?x0 ns:film.film.written_by M2 .
  ?x0 ns:film.film.written_by M3 .
  ?x0 ns:film.film.written_by M4 .
  M5 ns:film.producer.films_executive_produced ?x0 .
  M5 ns:film.producer.film|ns:film.production_company.films ?x0
  }