<prompt> unaweza kugeuza matini haya ya swahilikwa kiingereza?badala yake, tulipata mifereji ya ziwa katika eneo hili limepungua kwa theluthi moja kati ya mwaka wa 1950 na 2000.  <response>: instead, we found lake drainage in this area had decreased by one-third between 1950 and 2000. 