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She removed Charles from his parents ' court and kept him in her own castles , usually those in the Loire Valley , where Charles received Joan of Arc .
 Charles, Loire Valley, Charles, Joan of Arc
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Charles, Loire Valley, Charles, Joan of Arc