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The five largest ethnic groups reported in this woreda were the Hamer ( 70.36 % ) , the Tsamai ( 14.21 % ) , the Arbore ( 5.77 % ) , the Aari ( 5.18 % ) , and the Amhara ( 2.07 % ) ; all other ethnic groups made up 2.41 % of the population .
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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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