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The Ten Essentials were first described in the 1930s by The Mountaineers , a hiking and mountain climbing club .
 organization: The Mountaineers
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: The Mountaineers 
Answer:
 organization: The Mountaineers