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Geography Despite its elevation of 930 metres ( 3051 ft ) , the waters can reach 24 degrees Celsius in the summer months , while in winter the water freezes over completely and allows skaters to move freely on the ice .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None