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The Battle of the Rufiji Delta was fought in German East Africa ( modern Tanzania ) from October 1914-July 1915 during the First World War , between the German light cruiser , and a powerful group of British warships .
 Tanzania, German
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Tanzania, German