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Literaturwurst ( Literature Sausage ) is an Artist 's book , made by the Swiss-German artist Dieter Roth between 1961 and 1974 .
 Dieter Roth
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Dieter Roth