question: Was M2 edited by M3 , written by a company , and directed by a film editor
query: SELECT count(*) WHERE {
  ?x0 a ns:business.employer .
  ?x1 a ns:film.editor .
  M2 ns:film.film.directed_by ?x1 .
  M2 ns:film.film.edited_by M3 .
  M2 ns:film.film.written_by ?x0
  }