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It is fed from the ditches of the nearby Lehmkuhlenbruch and its waters exit through a short ditch into the Tiefwarensee , from which it is only separated by a narrow isthmus and small road .
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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:
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