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Song Seung-hyun ( ; Japanese : ソン • スンヒョン born August 21 , 1992 ) is a South Korean musician and actor .
 Song Seung-hyun
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Song Seung-hyun