<prompt> Translate the following text to SwahiliThe first solid references to this obscure settlement on the Castilian plateau, guarded by the looming Guadarrama mountain range, appear in the 9th century.  <response>: Maelezo ya kwanza ya makazi haya ya kawaida katika eneo la juu la Castile, lililolindwa na safu ya milima ya Guadarrama, yanaonekana katika karne ya tisa. 