Instructions: In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Input: Hertha was a founder of the Bundesliga in 1963 and was Berlin 's reigning champion .
Output:
At the time of the formation of the Bundesliga in 1963 , Hertha was Berlin 's reigning champion and so became an inaugural member of the new professional national league .