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Haridasa Thakur ( IAST ) ( born 1451 or 1450 ) was a prominent Vaishnava saint , instrumental in the early appearance and spread of Hare Krishna movement .
 Haridasa Thakur, Krishna
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Haridasa Thakur, Krishna