Ok, below is my new proposal...
Is that okay?
# License #
The Introduction chapter of this website is forked from the Tails trust
page (from this exact
([source](
http://git.immerda.ch/?p=amnesia.git;a=blob;f=wiki/src/doc/about/trust.mdwn;hb=d249db72228b498407d85fb762b49ec155871ded)),
which is copyrighted by [Tails](
https://tails.boum.org/) and licensed
under GPv3 or later (see license below). The derived work is copyrighted
by [adrelanos](
https://github.com/adrelanos/Whonix) and licensed under
the same license GPLv3 or later. (see license below)
<pre>
Copyright:
   Copyright (C) Amnesia <amnesia at boum dot org>
   Portions Copyright (C) adrelanos <adrelanos at riseup dot net>
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
        
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
    
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to:
    Free Software Foundation, Inc.
    51 Franklin St, Fifth Floor
    Boston, MA 02110-1301, USA.
On Debian GNU/Linux systems, the complete text of the GNU General Public
License can be found in the /usr/share/common-licenses' directory.
</pre>
The complete text of the GNU General Public License can also be found
online on <
https://www.gnu.org/licenses/gpl.html>.