/usr/share/ubiquity-slideshow/slides/l10n/da/ is in ubiquity-slideshow-edubuntu 113.
This file is owned by root:root, with mode 0o755.
..
/usr/share/ubiquity-slideshow/slides/l10n/da/accessibility.html
/usr/share/ubiquity-slideshow/slides/l10n/da/arkose.html
/usr/share/ubiquity-slideshow/slides/l10n/da/calc.html
/usr/share/ubiquity-slideshow/slides/l10n/da/calibre.html
/usr/share/ubiquity-slideshow/slides/l10n/da/desktop-software.html
/usr/share/ubiquity-slideshow/slides/l10n/da/documentation.html
/usr/share/ubiquity-slideshow/slides/l10n/da/edubuntu-menu-editor.html
/usr/share/ubiquity-slideshow/slides/l10n/da/empathy.html
/usr/share/ubiquity-slideshow/slides/l10n/da/epoptes.html
/usr/share/ubiquity-slideshow/slides/l10n/da/fonts.html
/usr/share/ubiquity-slideshow/slides/l10n/da/freemind.html
/usr/share/ubiquity-slideshow/slides/l10n/da/gbrainy.html
/usr/share/ubiquity-slideshow/slides/l10n/da/installing-software.html
/usr/share/ubiquity-slideshow/slides/l10n/da/kdeedu.html
/usr/share/ubiquity-slideshow/slides/l10n/da/librecad.html
/usr/share/ubiquity-slideshow/slides/l10n/da/ltsp.html
/usr/share/ubiquity-slideshow/slides/l10n/da/pencil.html
/usr/share/ubiquity-slideshow/slides/l10n/da/testdrive.html
/usr/share/ubiquity-slideshow/slides/l10n/da/tomboy.html
/usr/share/ubiquity-slideshow/slides/l10n/da/tux4kids.html
/usr/share/ubiquity-slideshow/slides/l10n/da/underthehood.html
/usr/share/ubiquity-slideshow/slides/l10n/da/vym.html
/usr/share/ubiquity-slideshow/slides/l10n/da/welcome.html