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Kaşık Island , ( , literally " Spoon Island " ; ) is one of the nine islands consisting the Princes ' Islands in the Sea of Marmara , near Istanbul .
 location: Istanbul
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: Istanbul 
Answer:
 location: Istanbul