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Traffic of smaller vessels at Elbląg is within the river and very marginal , while larger vessels cannot reach the open Baltic Sea because the channel , once built in East-Prussia to go through the peninsula , has belonged to Russia since 1945 .
 location: Elbląg; location: Baltic Sea; location: East-Prussia; location: Russia
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: Elbląg, Baltic Sea, East-Prussia, Russia 
Answer:
 location: Elbląg; location: Baltic Sea; location: East-Prussia; location: Russia