10410
The caverns are part of a large network of natural limestone caves and underground waterways carved out by the third-largest underground river in the world , the Río Camuy ( Camuy River ) .
 Camuy, Camuy
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Camuy, Camuy