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He learned the various details of the production process and was named as the company 's sixth master distiller in 1988 , where he was responsible for supervising the " milling , yeasting , fermenting and distilling " involved in making the whiskey using a network of fermenters , stills and vats .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None