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`` We do n't see a domestic source for some of our { HDTV } requirements , and that 's a source of concern , '' says Michael Kelly , director of DARPA 's defense manufacturing office .
 Michael Kelly, DARPA
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 Michael Kelly, DARPA