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General George Washington sponsored a performance of Cato for the Continental Army during the difficult winter of 1777 – 78 at Valley Forge .
 George Washington, Continental Army, Valley Forge
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 George Washington, Continental Army, Valley Forge