question: What was a film distributor whose founder edited M1 , M2 , and M3
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.film_distributor .
  ?x0 ns:organization.organization.founders ?x1 .
  ?x1 ns:film.editor.film M1 .
  ?x1 ns:film.editor.film M2 .
  ?x1 ns:film.editor.film M3
  }