<prompt> Translate the following text to SwahiliThe war and the disastrous effects of the plague decimated the population of Poland, reducing it to just four million, roughly half its total in the early 17th century.  <response>: Vita na tauni hiyo iliharibu sana idadi ya watu wa Poland, wakapungua hadi milioni nne tu, karibu nusu ya idadi yao ya awali ya karne ya 17. 