On which side is the truck?
The truck is on the right of the image.
    src        edge_attr  dst
0     0   to the left of   13
1     0   to the left of    7
2     0  to the right of   18
3     0   to the left of    3
4     0   to the left of    8
..  ...              ...  ...
69   17   to the left of   14
70   18   to the left of    0
71   18   to the left of    1
72   18   to the left of    7
73   18   to the left of   13

[74 rows x 3 columns]