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Naturally left-footed , at Defensor Sporting he was fielded as a left full-back , his preferred role , while in the national team he is often used as a central defender .
 Defensor Sporting
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Defensor Sporting