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/usr/share/doc/education-graphics/copyright is in education-graphics 1.924.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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This package was debianized by Raphael Hertzog <hertzog@debian.org> on
Mon, 23 Jul 2001 15:37:01 +0200.

Author(s): Raphael Hertzog <hertzog@debian.org> and
	   Petter Reinholdtsen <pere@hungry.com>

The source is available from
<URL:https://alioth.debian.org/projects/debian-edu/>

Copyright:

For the pixmaps directory:
Copyright 2007 Junta de Extremadura and 2002 and following years
KDE Artists. All the files are under LGPL. On Debian systems, the 
complete text of the  LGPL license can be found in the
/usr/share/common-licenses/LGPL file.

For the rest of files:

GNU General Public License

A copy of the GPL is available in /usr/share/common-licenses/GPL.