Are there any trains or ambulances?
No, there are no trains or ambulances.
     src        edge_attr  dst
0      0  to the right of   26
1      0  to the right of    8
2      0  to the right of    7
3      0  to the right of   24
4      1  to the right of   24
..   ...              ...  ...
126   27   to the left of   22
127   27   to the left of   26
128   27   to the left of    7
129   27   to the left of   11
130   27   to the left of   21

[131 rows x 3 columns]