Are there any blue trucks or trains?
Yes, there is a blue train.
    src        edge_attr  dst
0     0   to the left of    9
1     0  to the right of   17
2     0  to the right of    4
3     0  to the right of    5
4     1   to the left of    9
..  ...              ...  ...
83   16  to the right of    6
84   16  to the right of    7
85   17   to the left of   12
86   17   to the left of    0
87   18   to the left of   11

[88 rows x 3 columns]