What is common to the post and the bus?
The color, both the post and the bus are white.
    src        edge_attr  dst
0     0   to the left of   23
1     0  to the right of    2
2     1  to the right of   18
3     1  to the right of   20
4     1   to the left of   12
..  ...              ...  ...
67   25   to the left of   10
68   25   to the left of   18
69   25               on   19
70   25   to the left of    3
71   25   to the left of   11

[72 rows x 3 columns]