<prompt> Translate the following text to EnglishMji huo ulianzishwa mwaka 1538 na mji wa Villa de la Vega, ambao baadaye ulibadilishwa jina kuwa St. Jago de la Vega.  <response>: They chose the flatlands around the Rio Cobra and, in 1538, established Villa de la Vega, whose name was later changed to St. Jago de la Vega. 