/usr/share/doc/libsefs4/changelog.Debian.gz is in libsefs4 3.3.6.ds-7.2ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libsefs4/../libapol4/changelog.Debian.gz
/usr/share/doc/libsefs4/../libapol4/changelog.Debian.gz