question: Was M1 written by a cinematographer , written by M2 , M3 , and M4 , and written by M5 and M6
query: SELECT count(*) WHERE {
  ?x0 a ns:film.cinematographer .
  M1 ns:film.film.written_by ?x0 .
  M1 ns:film.film.written_by M2 .
  M1 ns:film.film.written_by M3 .
  M1 ns:film.film.written_by M4 .
  M1 ns:film.film.written_by M5 .
  M1 ns:film.film.written_by M6
  }