The package appears to be licensed under a Creative Commons license but only includes the human-readable summary in the debian/copyright file which is not the actual licence. The Creative Commons webpages contains the following disclaimer:
This deed highlights only some of the key features and terms of the actual license. It is not a license and has no legal value. You should carefully review all of the terms and conditions of the actual license before using the licensed material.
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Please use the full, plain-text version of the license text which may be found here: