1831
The clear , cool water of the mountain streams was also dammed by early mountain folk to form the various mountain ponds of the Upper Harz waterways , such as the Oderteich .
 location: Upper Harz; location: Oderteich
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: Upper Harz; location: Oderteich