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2013 U.S. Senate election In 2013 , when Massachusetts senior U.S. Senator John Kerry was nominated to be U.S. Secretary of State and resigned his office , Gomez announced his candidacy as a Republican for that office .
 Kerry, Republican
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Kerry, Republican