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Samuel Rhea Gammon III ( born January 22 , 1924 ) was an American diplomat and former United States Ambassador to Mauritius under the Carter Administration .
 Samuel Rhea Gammon III
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Samuel Rhea Gammon III