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International career Ruiz was never capped by Spain at senior level , but did play for the U-21s once .
 Ruiz, Spain at senior level, U-21s
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ruiz, Spain at senior level, U-21s