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Sen delivered a lecture based on the book ( The Penguin Annual Lecture ) in Kolkata on August 5 which was followed by a discussion with Barkha Dutt .
 Sen, Kolkata, Barkha Dutt
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Sen, Kolkata, Barkha Dutt