| http://www.w3.org/ns/prov#value | - The feature itself is enough to warrant owning the DVD, but supplements are generous, including the 20-min. documentary The Making of Mark Twain with comments from Burns and co-writer/producer Dayton Duncan; an interview feature with Burns (10 min.); additional Twain quotes and photographs; the PBS behind-the-scenes short Ken Burns: Making History (7 min.); and interview outtakes from the film
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