<prompt> Translate the following text to SwahiliThe Portuguese also sailed down the west coast of Africa, going beyond Cape Bojador in 1434, a feat theretofore considered to be impossible.  <response>: Ureno pia ilisafiri kwa meli kwenye pwani ya magharibi ya Afrika, ikivuka Cape Bojador mwaka wa 1434, jambo ambalo hapo awali lilionwa kuwa lisilowezekana. 