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"Norman Lear: Just Another Version of You," a documentary about the legendary TV producer who broached bigotry, war, poverty and other issues through laughter in such sitcoms as "All in the Family," "Maude," "The Jeffersons" and more, opened the 2016 Sundance Film Festival in Park City on Thursday, Jan. 21. The documentary is directed by Heidi Ewing and Rachel Grady ("12th & Delaware," SFF '10; "Detropia," SFF '12).