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He spent a second year in Vermont , as Deputy State 's Attorney in Chittenden County , before moving on to Washington , D.C. to serve as Senior Staff Counsel to the House Select Committee on Assassinations from 1977 to 1979 .
 Vermont, Chittenden County, 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:
 Vermont, Chittenden County, Washington , D.C.