<prompt> Translate the following text to SwahiliPerhaps Zarco knew precisely where he was heading, having learned of the existence of Madeira from a Castilian source.  <response>: Labda Zarco alijua hasa mahali alipokuwa akienda, baada ya kujifunza juu ya kuwepo kwa Madeira kutoka kwa chanzo cha Kikasitilia. 