premise: Nero's death ended the Duck dynasty.
hypothesis: Nero ( [ ˈnɪəroʊ ] Latin : Nerō Claudius Caesar Augustus Germanicus ; 15 December 37 AD -- 9 June 68 AD ) was Roman Emperor from 54 to 68 AD , and the last in the Julio-Claudian dynasty . His death ended the Julio-Claudian dynasty , sparking a brief period of civil wars known as the Year of the Four Emperors .