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The Serra del Cadí comprises the highest peaks in the Pre-Pyrenees and forms the southern boundary of the Cerdanya valley .
 Serra del Cadí, Pre-Pyrenees, Cerdanya
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Serra del Cadí, Pre-Pyrenees, Cerdanya