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A study by " Nature " in 2005 found that Wikipedia 's science articles were roughly comparable in accuracy to those of " Encyclopædia Britannica " , containing the same number of serious errors and about 1 / 3 more minor factual inaccuracies , but that Wikipedia 's writing tended to be confusing and less readable .
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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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