question: Were M1 and M6 directed by a person , edited by M3 , M4 , and M5 , and written by M2
query: SELECT count(*) WHERE {
  ?x0 a ns:people.person .
  M1 ns:film.film.directed_by ?x0 .
  M1 ns:film.film.edited_by M3 .
  M1 ns:film.film.edited_by M4 .
  M1 ns:film.film.edited_by M5 .
  M1 ns:film.film.written_by M2 .
  M6 ns:film.film.directed_by ?x0 .
  M6 ns:film.film.edited_by M3 .
  M6 ns:film.film.edited_by M4 .
  M6 ns:film.film.edited_by M5 .
  M6 ns:film.film.written_by M2
  }