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The russet sparrow has usually been placed in the genus " Passer " , and within this genus it is seen as a part of the " Palearctic black-bibbed sparrow " group , which includes the Eurasian tree sparrow as well as the house sparrow .
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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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