Original sentence: It is supposed that the Ethiopians, the ancestors of today's [[Galla]poloticaly incorect the word inslots sertain group of Ethiopian people]  tribe, were the first to have discovered and recognized the energizing effect of the coffee bean plant
Edited sentence: It is supposed that the Ethiopians, the ancestors of today's Galla tribe, were the first to have discovered and recognized the energizing effect of the coffee bean plant