question: Were M3 , M4 , M5 , and M6 directed by M2 's star and written by a person that M1 employed
query: SELECT count(*) WHERE {
  ?x0 a ns:people.person .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
  ?x1 ns:film.actor.film/ns:film.performance.film M2 .
  M3 ns:film.film.directed_by ?x1 .
  M3 ns:film.film.written_by ?x0 .
  M4 ns:film.film.directed_by ?x1 .
  M4 ns:film.film.written_by ?x0 .
  M5 ns:film.film.directed_by ?x1 .
  M5 ns:film.film.written_by ?x0 .
  M6 ns:film.film.directed_by ?x1 .
  M6 ns:film.film.written_by ?x0
  }