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Hops are the female flower clusters or seed cones of the hop vine " Humulus lupulus " , which are used as a flavouring and preservative agent in nearly all beer made today .
 location: Humulus
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Humulus