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An " aerosani " ( , literally " aerosled " ) is a type of propeller-driven snowmobile , running on skis , used for communications , mail deliveries , medical aid , emergency recovery and border patrolling in northern Russia , as well as for recreation .
 location: Russia
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:
 location: Russia