Input (grade 13): CCI Entertainment, a Canadian film company, produced a documentary film entitled, My Opposition: the Diaries of Friedrich Kellner, which interweaves the stories of Kellner and his American grandson.
Output (grade 8): In 2007, a Canadian film company made a documentary film about both Friedrich Kellner and his grandson Robert Scott Kellner. The film is called, My Opposition: the Diaries of Friedrich Kellner.