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The Fugitive Investigative Strike Team , or FIST operations were a series of operations conducted by the United States Marshals to capture violent fugitive s wanted by state and federal law enforcement agencies in the United States .
 United States Marshals, United States
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 Marshals, United States