<prompt> Translate the following text to SwahiliNot surprisingly for a volcanic island, the sand here is black, and even this stretch is sometimes washed away.  <response>: Kwa sababu ya kuwa ni kisiwa cha volkano, si jambo la kushangaza kwamba mchanga wa kisiwa hicho ni mweusi, na nyakati nyingine hata sehemu hiyo huondolewa na maji. 