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He appeared in the tenth episode of the fourth season , where it was rumored by the characters that he would get in a fight with famed cellist Yo-Yo Ma , who also appeared in the episode .
 Yo-Yo Ma
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Yo-Yo Ma