<prompt> Translate the following text to EnglishNyumba hizo zilijengwa kwa ajili ya wafanyabiashara na wasimamizi wa Ottoman, lakini ziliachwa katika kubadilishana kwa idadi ya watu katika miaka ya 1920.  <response>: The villas were built for Ottoman traders and overseers, but were abandoned in the exchange of populations in the 1920s. 