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Two less commonly used metrics include the Fallout , i.e. , the fraction of not relevant documents that are retrieved ( b / ( b + d ) ) , and the Miss , which refers to the fraction of relevant documents that are not retrieved ( c / ( c + d ) ) during any given search .
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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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