question: Was a film that was written by M4 and starred M2 and M3 M0
query: SELECT count(*) WHERE {
  M0 a ns:film.film .
  M0 ns:film.film.starring/ns:film.performance.actor M2 .
  M0 ns:film.film.starring/ns:film.performance.actor M3 .
  M0 ns:film.film.written_by M4
  }