Do you see boxes to the left of the vehicle the man is in?
No, there is a fence to the left of the train.
    src        edge_attr  dst
0     0  to the right of    3
1     0  to the right of   19
2     1   to the left of    8
3     1  to the right of   12
4     1  to the right of   17
..  ...              ...  ...
67   18   to the left of    7
68   18   to the left of    5
69   19  to the right of   14
70   19   to the left of    0
71   20   to the left of   11

[72 rows x 3 columns]