<prompt> Translate the following text to EnglishHata hivyo, mwanzoni mwa karne ya 20, kulikuwa na mabadiliko kadhaa yenye kuangamiza ambayo yaliharibu biashara ya sifongo huko Kalymnos.  <response>: However, the early 20th century saw several catastrophic changes that ruined the commercial sponge industry on Kalymnos. 