<prompt> tafsiri zifuatazo kutoka kwa swahili hadi kiingereza.tangazo hilo lilijiri huku rais wa sudan kusini salva kiir akiwa kwenye ziara yake nchini kenya kwa siku ya pili.  <response>: the appointment comes at a time when south sudan president salva kiir is on the last day of his two-day visit to kenya. 