332902
Valkumey was founded in 1941 when mining began in this area , and the first few tons of tin were extracted from the Valkumey mine in the form of cassiterite .
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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:  
Answer:
 None