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Real Zaragoza " B " is a Spanish football club based in Zaragoza , in the autonomous community of Aragon .
 Real Zaragoza, Zaragoza, Aragon
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Real Zaragoza, Zaragoza, Aragon