Simplify the following text for a Grade 4 native English-speaking person.
Original: As a result of his activity he underwent a year 's imprisonment in 1849 for resistance to the authorities of DÃ 1\/4 sseldorf and was thereafter banned from living in Berlin .
Simplified: He was put into prison and later banned from Berlin . He lived in DÃ 1\/4 sseldorf that time .