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to Share — copy and redistribute the material in any medium or format
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The licensor cannot revoke these freedoms as long as you follow the license terms.
Under the following terms:
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You do not have to comply with the license for elements of the material in the public domain or where your use is permitted by an applicable exception or limitation.
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For more information visit http://creativecommons.org/licenses/by-nc/4.0/legalcode.