question: Was a film written by M1 and M2 , written by M3 , M4 , M5 , and M6 , and edited by M7
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film .
  ?x0 ns:film.film.edited_by M7 .
  ?x0 ns:film.film.written_by M1 .
  ?x0 ns:film.film.written_by M2 .
  ?x0 ns:film.film.written_by M3 .
  ?x0 ns:film.film.written_by M4 .
  ?x0 ns:film.film.written_by M5 .
  ?x0 ns:film.film.written_by M6
  }