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Milton Erick Melgar Cuéllar ( born November 20 , 1986 in Santa Cruz de la Sierra ) is a Bolivia n football midfielder .
 Milton Erick Melgar, Santa Cruz de la Sierra, Bolivia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Milton Erick Melgar, Santa Cruz de la Sierra, Bolivia