question: What sequel of a sequel of M2 did M0 and M1 edit
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.film.edited_by M0 .
  ?x0 ns:film.film.edited_by M1 .
  ?x0 ns:film.film.prequel ?x1 .
  ?x1 ns:film.film.prequel M2
  }