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Henry K. Giugni ( January 11 , 1925 – November 3 , 2005 ) was Sergeant at Arms of the United States Senate from 1987 to 1991 .
 K. Giugni
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 K. Giugni