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Monique Adamczak and Stephanie Bengson are the defending champions , having won the event in 2012 .
 Monique Adamczak, Stephanie Bengson
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Monique Adamczak, Stephanie Bengson