question: Who executive produced M1 and edited a film 's sequel
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:people.person .
  ?x0 ns:film.editor.film ?x1 .
  ?x0 ns:film.producer.films_executive_produced M1 .
  ?x1 ns:film.film.prequel ?x2 .
  ?x2 a ns:film.film
  }