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During the two and a half years he spent with the Taxpayer Protection Alliance in both Nashville and Washington , D.C. , he also wrote a weekly column for Newsmax .
 Nashville, Washington , D.C.
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Nashville, Washington , D.C.