On which side is the trailer?
The trailer is on the right of the image.
    src        edge_attr  dst
0     0   to the left of    8
1     0   to the left of    5
2     0   to the left of    9
3     0   to the left of    2
4     0   to the left of    1
..  ...              ...  ...
59   14  to the right of   10
60   14  to the right of    0
61   15   to the left of   13
62   15  to the right of   10
63   15  to the right of    6

[64 rows x 3 columns]