Is the bus black or white?
The bus is white.
    src        edge_attr  dst
0     0  to the right of   20
1     0   to the left of    3
2     0             near   20
3     1   to the left of   24
4     1   to the left of    7
..  ...              ...  ...
76   24  to the right of    1
77   24   to the left of    9
78   24   to the left of    8
79   24   to the left of    7
80   24   to the left of    6

[81 rows x 3 columns]