20907
While unconscious , Thai Cong arrived at the Heavenly Palace of the Jade Emperor and witnessed Lieu Hanh drop the emperor 's favorite jade cup , for which the Emperor expelled Lieu Hanh from heaven .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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