/usr/share/applications/sgt-untangle.desktop is in sgt-launcher 0.2.4-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Version=1.0
Terminal=false
Exec=sgt-untangle
Icon=sgt-untangle
Type=Application
Categories=Game;LogicGame;
Name=Untangle
Comment=Position the points so that no line crosses another
Comment[fr]=Placer les attaches de telle sorte qu'aune ligne ne se croise
Comment[de]=Positioniere die Punkte, so dass sich keine Linien kreuzen
NoDisplay=true
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