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