question: Were M4 and M5 produced by a British writer of M0 , M1 , and M2
query: SELECT count(*) WHERE {
  ?x0 ns:film.writer.film M0 .
  ?x0 ns:film.writer.film M1 .
  ?x0 ns:film.writer.film M2 .
  ?x0 ns:people.person.nationality ns:m.07ssc .
  M4 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
  M5 ns:film.film.produced_by|ns:film.film.production_companies ?x0
  }