Simplify the following text for a Grade 5 native English-speaking person.
Original: The Karlsruher SC II , historically also referred to as Karlsruher SC Amateure , is a successful side in its own right , playing as high up as the Regionalliga SÃ 1\/4 d , where it is currently , as of 2009 â `` 10 , based .
Simplified: Karlsruher SC is a German football club in the second division ( 2 .