<prompt> Translate the following text to SwahiliPresidential historian Stephen Ambrose begins his NewsHour appearance by inveighing against evening newscasts too smutty to watch with his 12-year-old granddaughter.  <response>: Mwanahistoria wa urais Stephen Ambrose anaanza kuonekana kwake katika kipindi cha NewsHour kwa kupinga vipindi vya habari vya jioni ambavyo ni vya uchafu sana kuweza kutazamwa na mjukuu wake mwenye umri wa miaka 12. 