Input (grade 13): In 2007 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 9): In 2007, the Canadian film company, CCI Entertainment of Toronto, 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.