question: Which prequel of M0 was executive produced by a film producer and directed by M1
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.film.directed_by M1 .
  ?x0 ns:film.film.executive_produced_by ?x1 .
  ?x0 ns:film.film.sequel M0 .
  ?x1 a ns:film.producer
  }