question: Were M3 and M4 produced by , directed by , and edited by a British person that M1 was written by
query: SELECT count(*) WHERE {
  ?x0 a ns:people.person .
  ?x0 ns:film.writer.film M1 .
  ?x0 ns:people.person.nationality ns:m.07ssc .
  M3 ns:film.film.directed_by ?x0 .
  M3 ns:film.film.edited_by ?x0 .
  M3 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
  M4 ns:film.film.directed_by ?x0 .
  M4 ns:film.film.edited_by ?x0 .
  M4 ns:film.film.produced_by|ns:film.film.production_companies ?x0
  }