This is liwc, packaged for Debian by Lars Wirzenius <liw@iki.fi>.
Original author is also Lars Wirzenius.  This Debian package is
nowadays maintained by Antti-Juhani Kaijanaho <ajk@debian.org>.

liwc is free software.  You may copy it according to the
GNU General Public License, version 2. A copy of the license
is not included, but you can get one from most FTP sites that
have GNU software, for example, prep.ai.mit.edu.

On a Debian GNU/Linux system, the GPL version 2 can be found in
/usr/share/common-licenses/GPL-2 (and if that file does not exist,
then /usr/share/common-licenses/GPL should contain it).
