What is the vehicle in front of the mountains?
The vehicle is a bus.
     src        edge_attr  dst
0      0   on the side of   23
1      0   to the left of   16
2      0  to the right of    1
3      0   to the left of   17
4      1   to the left of   17
..   ...              ...  ...
129   23  to the right of   21
130   23  to the right of   22
131   23   on the side of    2
132   23  to the right of    3
133   23  to the right of    9

[134 rows x 3 columns]