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Further downstream near Fiegenburg it collects a tributary from the west which drains the entire Egge valley ( Eggetal ) , and is then known as the Mühlbach ( " Mill Stream " ) , powering the mill at Gut Grollage , east of the Egge in front of the main crest of the Wiehen Hills .
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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