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The United States Geological Survey maintains a hazard zone mapping of the island done on a one to nine scale , with the most dangerous areas corresponding the smallest numbers .
 organization: United States Geological Survey
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:
 organization: United States Geological Survey