Does that bus look green or white?
The bus is white.
    src        edge_attr  dst
0     0   to the left of    2
1     0   to the left of   15
2     0   to the left of   11
3     0   to the left of   21
4     0   to the left of   20
..  ...              ...  ...
74   21  to the right of    7
75   21   to the left of    8
76   21  to the right of   12
77   21  to the right of   15
78   21  to the right of   18

[79 rows x 3 columns]