/usr/share/doc/libreoffice-help-da/README.gz is in libreoffice-help-da 1:4.2.3~rc3-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libreoffice-help-da/../libreoffice-l10n-da/README.gz