<prompt> Translate the following text to SwahiliWhile the NEPDG did provide some cost-related documents to GAO, most of these documents were not useful or self-explanatory.  <response>: Ingawa NEPDG ilitoa baadhi ya nyaraka zinazohusiana na gharama kwa GAO, wengi wa nyaraka hizi hazikuwa muhimu au kujieleza. 