349577
Peat extraction in the 17th and 18th century turned vast low-lying fen s into a collection of shallow , man-made lakes and bog s. Water lilies , reeds , swamps and wooded areas have developed spontaneously from the old peat canals ( trekgaten ) where the peat was extracted .
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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:
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