136535
Hailing from Thiruvallur District , he is presently serving as the Additional Director General of Police , Enforcement , 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