/usr/share/doc/libgtkdatabox-0.9.2-0-libglade/changelog.Debian.gz is in libgtkdatabox-0.9.2-0-libglade 1:0.9.2.0-3ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libgtkdatabox-0.9.2-0-libglade/../libgtkdatabox-0.9.2-0/changelog.Debian.gz