Complex sentence: The Niceno-Constantinopolitan Creed (the only creed with universal acceptance among Christians) is silent on the Descent into Hell; but the Descent is asserted in the Apostles'Creed, although nothing is said there about Christ's purpose.
Split into simpler sentences: The Niceno-Constantinopolitan Creed (the only creed with universal acceptance among Christians) is silent on the Descent into Hell. The Descent is asserted in the Apostles'Creed, but nothing is said there about Christ's purpose.