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The BTC is designed to transport up to 50 " million tons of crude oil annually and carries oil from the Caspian Sea oilfields to global markets .
 location: Caspian Sea
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: Caspian Sea 
Answer:
 location: Caspian Sea