Simplify the following text for a Grade 7 native English-speaking person.
Original: Here he was a member of the political students ' club , or German Burschenschaft , and in 1833 was arrested in Berlin by the Prussian government and interned at Fort Silberberg in Silesia .
Simplified: At Jena he joined a Burschenschaft ( political students ' club ) . In 1833 he was arrested in Berlin by the Prussian government .