What is the vehicle to the right of the passenger in the top?
The vehicle is a bus.
    src        edge_attr  dst
0     0  to the right of    2
1     0  to the right of   18
2     0  to the right of   13
3     0  to the right of    3
4     0  to the right of   14
..  ...              ...  ...
69   18               on   15
70   19  to the right of   13
71   19  to the right of   15
72   21   to the left of    3
73   21   to the left of   14

[74 rows x 3 columns]