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By 1556 – fewer than sixty years after it was finished – Giorgio Vasari described the painting as reduced to a " muddle of blots " so deteriorated that the figures were unrecognizable .
 Giorgio Vasari
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Giorgio Vasari