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At first , the Neolithic was associated with shifting subsistence cultivation , where continuous farming led to the depletion of soil fertility resulting in the requirement to cultivate fields further and further removed from the settlement , eventually compelling the settlement itself to move .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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