Complex sentence: The newly-created Principality of Halberstadt consisted of the old County of Osterwieck, the County of Halberstadt, the Principality of Anhalt-Aschersleben, the County of Regenstein (including Hainburg), and the County of Valkenstein.
Split into simpler sentences: The newly-created Principality of Halberstadt consisted of two counties, the County of Osterwieck and the County of Halberstadt. The principality also included the Principality of Anhalt-Aschersleben, the County of Regenstein (including Hainburg), and the County of Valkenstein.