/usr/share/doc/python-dballe/changelog.Debian.gz is in python-dballe 7.21-1build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/python-dballe/../libdballe7/changelog.Debian.gz
/usr/share/doc/python-dballe/../libdballe7/changelog.Debian.gz