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History repeats ... first as tragedy , then as farce " This book is the source of one of Marx 's most quoted statements , that history repeats itself , " the first as tragedy , then as farce " , referring respectively to Napoleon I and to his nephew Louis Napoleon ( Napoleon III ) : Hegel remarks somewhere that all great world-historic facts and personages appear , so to speak , twice .
 Marx, Napoleon, nephew Louis Napoleon, Napoleon, Hegel
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Marx, Napoleon, nephew Louis Napoleon, Napoleon, Hegel