What color is the carriage?
The carriage is black.
     src        edge_attr  dst
0      0   to the left of   16
1      0  to the right of    9
2      0  to the right of    3
3      1  to the right of    4
4      1  to the right of   15
..   ...              ...  ...
96    20   to the left of   14
97    20   to the left of    6
98    20   to the left of   18
99    20   to the left of   12
100   20   to the left of   13

[101 rows x 3 columns]