Complex sentence: A Documentary Film is an eight-part, 17½ hour, American documentary on the history of New York City directed by Ric Burns that originally aired in the U.S. on PBS and was a co-production of Thirteen/WNET New York and WGBH Boston.
Split into simpler sentences: A Documentary Film is an eight-part, 17½ hour, American documentary film on the history of New York City. The film was a co-production of Thirteen/WNET New York and WGBH Boston.