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The image shows four Creative Commons licences. (From left to right) Attribution (by) You may copy, distribute, display and perform the work and make derivative works based on it only if they give the author or licensor the credits in the manner specified by these. Non-commercial (NC) You may copy, distribute, display, and perform the work and make derivative works based on it only for noncommercial purposes. No Derivative Works (ND) You may copy, distribute, display and perform only verbatim copies of the work, not derivative works based on it. Share Alike (SA) You may distribute derivative works only under a license identical to the license that governs the original work. Below the badges is a notice that reads: A licence cannot feature both the Share Alike and No Derivative Works options. The Share Alike requirement applies only to derivative works.

 2.2 About licensing