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In Iceland , cairns were often used as markers along the numerous single-file roads or paths that crisscrossed the island ; many of these ancient cairns are still standing , although the paths have disappeared .
 location: Iceland
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: Iceland 
Answer:
 location: Iceland