Which color is the bus?
The bus is light blue.
    src        edge_attr  dst
0     0               on    9
1     0   to the left of   13
2     0   to the left of   11
3     0  to the right of   14
4     1               on   12
..  ...              ...  ...
69   14   to the left of    2
70   14   to the left of    0
71   15   to the left of   11
72   15  to the right of    5
73   15  to the right of   14

[74 rows x 3 columns]