/usr/share/applications/labyrinth.desktop is in labyrinth 0.6-0ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 | [Desktop Entry]
Name=Labyrinth Mind-mapping
GenericName=Mind-mapping
Comment=Map your mind
Exec=labyrinth
Icon=labyrinth
StartupNotify=true
Terminal=false
Type=Application
Categories=GNOME;GTK;Application;Office;
|