question: Was M0 a film producer that M5 and M6 starred and M2 , M3 , and M4 were written by
query: SELECT count(*) WHERE {
  M0 a ns:film.producer .
  M0 ns:film.actor.film/ns:film.performance.film M5 .
  M0 ns:film.actor.film/ns:film.performance.film M6 .
  M0 ns:film.writer.film M2 .
  M0 ns:film.writer.film M3 .
  M0 ns:film.writer.film M4
  }