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Hamilton Pool Preserve is a natural pool that was created when the dome of an underground river collapsed due to massive erosion thousands of years ago .
 location: Hamilton Pool Preserve
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Hamilton Pool Preserve 
Answer:
 location: Hamilton Pool Preserve