<prompt> Translate the following text to EnglishKatikati ya caldera kuna maeneo mawili ya chini ya ardhi ambayo yalionekana baada ya 1500 KK: Nea Kamenni na Palea Kamenni.  <response>: In the center of the caldera are two low-lying areas of land that appeared after the 1500 b.c. Nea Kameni and Palea Kameni. 