<prompt> Translate the following text to SwahiliAll these were companies that KKR had owned for an extended period of time during which all had expanded, improved productivity, and--in the case of Duracell--benefited from increases in R D spending.  <response>: Kampuni zote hizo zilikuwa za KKR kwa muda mrefu, wakati huo wote walikuwa wamepanuka, kuboresha uzalishaji, na - katika kesi ya Duracell - walifaidika kutokana na ongezeko la matumizi ya R D. 