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He served as Chief Clerk for the United States Department of State , succeeding John Graham on September 22 , 1817 , and remained in that position until August 22 , 1833 .
 United States Department of State, John Graham
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 United States Department of State, John Graham