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Dr. Prabhakar specializes in academic and policy research on the following areas : Nuclear Missile issues in Southern Asia ; on Maritime Security issues in the Indian Ocean and the Asia-Pacific Region and on research in India-United States Strategic Relations ; Grand Strategy of India and Grand Strategy of China .
 Prabhakar
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
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Answer:
 Prabhakar