<prompt> Translate the following text to EnglishMiaka minne aliyoishi hapa ilikuwa sehemu yenye kusisimua zaidi ya maisha yake yote na ingeweza kuwa sehemu yenye furaha zaidi ya maisha yake ya kazi.  <response>: His four years here were the most exciting part of his whole life and could have been the happiest part of his professional one. 