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MILAN, ITALY - APRIL 17: 'Mutable Spirit' is displayed at the Triennale Milano on April 17, 2012 in Milan, Italy. (Photo by Tullio M. Puglia/Getty Images)

MILAN, ITALY - APRIL 17:  'Mutable Spirit' is displayed at the Triennale Milano on April 17, 2012 in Milan, Italy.  (Photo by Tullio M. Puglia/Getty Images)