<prompt> Translate the following text to SwahiliWhile Plotz is right that the number of challenges remaining seems to be decreasing--it could hardly increase--I find it almost impossible to believe that previous record-setters were driven by the kind of practical, commercial concerns that Plotz ascribes to Ferdinand Magellan and Dick Rutan.  <response>: Wakati Plotz anasema Nambari ya changamoto zinazobaki zinaonekana kupungua - haiwezi kuongezeka - mimi kupata ni karibu haiwezekani kuamini kwamba rekodi za awali ziliendeshwa na aina ya wasiwasi wa kibiashara na biashara ambayo Plotz anatoa kwa Ferdinand Magellan na Dick Rutten. 