Which side of the photo is the trailer on?
The trailer is on the left of the image.
     src        edge_attr  dst
0      0               on    1
1      0   to the left of   35
2      1   to the left of   38
3      1   to the left of    4
4      1   to the left of   34
..   ...              ...  ...
215   41  to the right of   18
216   41  to the right of   29
217   42   to the left of    3
218   42  to the right of    4
219   42   to the left of    6

[220 rows x 3 columns]