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Early life and education Born on 3 October 1959 , C.K. Gandhirajan did his schooling in the Thiruvallur District of Tamil Nadu .
 Thiruvallur District, Tamil Nadu
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Thiruvallur District, Tamil Nadu