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The one major outflow is the Lukuga River , which empties into the Congo River drainage .
 location: Lukuga River; location: Congo River
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: Lukuga River, Congo River 
Answer:
 location: Lukuga River; location: Congo River