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An example for this is the salt flats in the Rub ' al Khali desert in Saudi Arabia .
 location: Rub ' al Khali; location: Saudi Arabia
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: Rub ' al Khali, Saudi Arabia 
Answer:
 location: Rub ' al Khali; location: Saudi Arabia