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