Complex sentence: A man of populistic nature, rugged, eccentric and outspoken, Jahn often came into conflict with the authorities, and this conflict resulted in the closing of the Turnplatz in 1819 and Jahn's arrest.
Split into simpler sentences: A man of populistic nature, rugged, eccentric and outspoken, Jahn often came into conflict with the authorities. The conflict resulted in the closing of the "Turnplatz" in 1819 and Jahn's arrest.