graph { root: Bonn; }
[ Bonn ] -- [ train ] --> [ Ulm ] -- [ car ] --> [ Hof ]
[ ] -- buy --> [ train ] { shape: none; }
[ ] -- rent --> [ car ] { shape: edge; }
graph { root: Bonn; }
[ Bonn ] -- [ train ] --> [ Ulm ] -- [ car ] --> [ Hof ]
[ ] -- buy --> [ train ] { shape: none; }
[ ] -- rent --> [ car ] { shape: edge; }