question: Who produced a sequel of a film and edited M1 , M2 , and M3
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.producer.film|ns:film.production_company.films ?x1 .
  ?x1 ns:film.film.prequel ?x2 .
  ?x2 a ns:film.film
  }