Are there blue trucks or buses?
Yes, there is a blue bus.
     src        edge_attr  dst
0      0  to the right of   18
1      0   to the left of   14
2      0   to the left of   22
3      0   to the left of   19
4      0   to the left of   11
..   ...              ...  ...
138   22               in    8
139   23   to the left of    4
140   23  to the right of   10
141   23  to the right of   11
142   23  to the right of   13

[143 rows x 3 columns]