52191
The process normally occurs in multiple treatments that can last anywhere from one or two treatments during the early stages of fermentation ( to help avoid stuck fermentation ) to a more prolonged treatment during the maturation period that can last four to eight months .
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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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