<prompt> Translate the following text to EnglishKama hadithi inavyosimulia, Bonde la Kathmandu wakati mmoja lilikuwa ziwa kubwa, ambalo lilitandazwa na ua kubwa la lotus, ambalo lilitoka kwa mwangaza wa Swayambhu, Buddha wa awali.  <response>: Legend holds that the Kathmandu Valley was once a vast lake, upon which floated a giant lotus flower, from which emanated the light of Swayambhu, the primordial Buddha. 