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