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In the Treaty of Eger in ( 1459 ) , elector Frederick , Duke William III and the king of Bohemia George of Podebrady fixed the borders between Bohemia and Saxony , at the height of the Erzgebirge and the middle of the Elbe which still holds today .
 Frederick, III, George of Podebrady, Saxony
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Frederick, III, George of Podebrady, Saxony