/usr/share/help/th/eog/slideshow.page is in eog 3.18.2-1ubuntu2.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/help/th/eog/../../../help-langpack/th/eog/slideshow.page
/usr/share/help/th/eog/../../../help-langpack/th/eog/slideshow.page