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The Black Sea serves as an economic thoroughfare connecting the Caucasus region and the Caspian Sea to central and Eastern Europe .
 location: Black Sea; location: Caucasus; location: Caspian Sea; location: Eastern Europe
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: Black Sea; location: Caucasus; location: Caspian Sea; location: Eastern Europe