question: What prequel of a film did M0 , M1 , M2 , M3 , and M4 write
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.film.sequel ?x1 .
  ?x0 ns:film.film.written_by M0 .
  ?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 .
  ?x1 a ns:film.film
  }