/usr/share/doc/libsane-extras/changelog.gz is in libsane-extras 1.0.22.3ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libsane-extras/../libsane-extras-common/changelog.gz
/usr/share/doc/libsane-extras/../libsane-extras-common/changelog.gz