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Gumnaam Vikramaditya ( ) ( 2011 ) , literally Unknown Vikramaditya , is a historical Hindi minor poem ( Khandakavya ) composed by Prem Nirmal ( 1938 - ) of Hapur .
 Vikramaditya, Vikramaditya, Hapur
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Vikramaditya, Vikramaditya, Hapur