/usr/share/doc/witty-examples/changelog.Debian.gz is in witty-examples 3.1.10-1ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/witty-examples/../libwt29/changelog.Debian.gz
/usr/share/doc/witty-examples/../libwt29/changelog.Debian.gz