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The refuge was formally established and renamed in 1998 , and is now run by the United States Fish and Wildlife Service as part of the Potomac River National Wildlife Refuge Complex .
 United States Fish and Wildlife Service, Wildlife
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 Fish and Wildlife Service, Wildlife