"WLDFILE - This undated file photo provided by Sotheby's shows the three panels of Francis Bacon's ""Triptych, 1976."" The painting, which sold in May 2008 for $86,281,000 is one of eight works that have sold for $80 million or more at auction. When Edvard Munch's ""The Scream,"" is auctioned at Sotheby's in New York Wednesday May 2, 2012, it could sell for $80 million or more. (AP Photo/Sotheby's, File)"
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