Complex sentence: In May 1954, following the new conviction, Ioanid was moved from Oradea to the Aiud prison, the destination of political prisoners considered most dangerous: Its reputation was well established.
Split into simpler sentences: In May 1954, following the new conviction, Ioanid is moved from Oradea to the Aiud prison. Aiud was the destination of the political prisoners that were considered most dangerous by the authorities: Its reputation was well established.