question: Was a screenwriter a American British star of M3 , M4 , M5 , and M6
query: SELECT count(*) WHERE {
  ?x0 a ns:film.writer .
  ?x0 ns:film.actor.film/ns:film.performance.film M3 .
  ?x0 ns:film.actor.film/ns:film.performance.film M4 .
  ?x0 ns:film.actor.film/ns:film.performance.film M5 .
  ?x0 ns:film.actor.film/ns:film.performance.film M6 .
  ?x0 ns:people.person.nationality ns:m.07ssc .
  ?x0 ns:people.person.nationality ns:m.09c7w0
  }