question: Was M0 a film director that M1 and M2 starred and were directed by
query: SELECT count(*) WHERE {
  M0 ns:film.actor.film/ns:film.performance.film M1 .
  M0 ns:film.actor.film/ns:film.performance.film M2 .
  M0 ns:film.director.film M1 .
  M0 ns:film.director.film M2
  }