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Its sluggishness is due to the very gradual slope of the channel , which in Lower Saxony averages a mere 10 – 20 " cm per kilometre .
 location: Lower Saxony
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: Lower Saxony