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At the time of its completion the Siemens-Schuckert R. VIII was the largest complete aeroplane in the world , ( the Mannesman-Poll triplane was to have been much bigger but was not completed before the Versaille Treaty restrictions were applied ) .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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