Are there white cars or trains?
Yes, there is a white train.
    src        edge_attr  dst
0     0  to the right of    3
1     1  to the right of    9
2     1  to the right of   10
3     3   to the left of    0
4     3   to the left of    4
..  ...              ...  ...
74   23   to the left of   14
75   23   to the left of   15
76   23   to the left of   17
77   23   to the left of   16
78   23   to the left of   21

[79 rows x 3 columns]