question: Which prequel of M0 did M5 and M6 write , M1 executive produce , and M2 , M3 , and M4 executive produce
query: SELECT DISTINCT ?x0 WHERE {
  ?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.executive_produced_by M4 .
  ?x0 ns:film.film.sequel M0 .
  ?x0 ns:film.film.written_by M5 .
  ?x0 ns:film.film.written_by M6
  }