Is the trailer on the left side or on the right of the picture?
The trailer is on the left of the image.
    src        edge_attr  dst
0     0   parked next to   19
1     0  to the right of    1
2     0  to the right of    9
3     0        parked at   19
4     1  to the right of    2
..  ...              ...  ...
77   19  to the right of   13
78   19  to the right of   10
79   20  to the right of   10
80   20  to the right of   18
81   20   to the left of   15

[82 rows x 3 columns]