question: Who edited M1 , M2 , and M3 , edited M4 and M5 , and executive produced M6 's prequel
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:people.person .
  ?x0 ns:film.editor.film M1 .
  ?x0 ns:film.editor.film M2 .
  ?x0 ns:film.editor.film M3 .
  ?x0 ns:film.editor.film M4 .
  ?x0 ns:film.editor.film M5 .
  ?x0 ns:film.producer.films_executive_produced ?x1 .
  ?x1 ns:film.film.sequel M6
  }