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Paul Capdeville and Marcel Felder were the defending champions but Felder decided not to participate .
 Paul Capdeville, Marcel Felder, Felder
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Paul Capdeville, Marcel Felder, Felder