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With a metropolitan population around 192,000 it is the second most populated urban area in Castile and León , after Valladolid ( 414,000 ) , and closely followed by Leon ( 187,000 ) and Burgos ( 176,000 ) .
 Castile, León, Valladolid, Leon, Burgos
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Castile, León, Valladolid, Leon, Burgos