<prompt> Translate the following text to SwahiliHe tells for the first time how the selective mechanism for the educated class--the SAT--came to occupy its current dominant role.  <response>: Yeye anaelezea kwa mara ya kwanza jinsi utaratibu wa uteuzi kwa ajili ya darasa elimu - SAT - alikuja kuchukua jukumu lake la sasa kutawala. 