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Amber Rubarth ( born September 21 , 1982 ) is an independent American Singer-Songwriter who has released 6 albums and 2 EPs .
 Amber Rubarth
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Amber Rubarth