30450
It is the third-largest National Wildlife Refuge in the United States , although it is less than one-half the size of either of the two largest , the Arctic National Wildlife Refuge , or the Yukon Delta National Wildlife Refuge .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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