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A survey published in March 2016 estimates a population of 14,613 Sumatran orangutans in the wild , doubling previous population estimates .
 location: Sumatran
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: Sumatran