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Something like ""I grant permission to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts."" Make sure that he understands that this license allows others to modify and distribute the image. Then just forward that e-mail to permissions-en AT wikimedia DOT org. Thanks for following up on this, ˉˉ╦╩ "