question: Was M2 directed and executive produced by a film director that M1 starred
query: SELECT count(*) WHERE {
  ?x0 a ns:film.director .
  ?x0 ns:film.actor.film/ns:film.performance.film M1 .
  M2 ns:film.film.directed_by ?x0 .
  M2 ns:film.film.executive_produced_by ?x0
  }