What is parked behind the horse on the right of the picture?
The truck is parked behind the horse.
    src        edge_attr  dst
0     0  to the right of   17
1     0  to the right of   15
2     0  to the right of   21
3     1    parked behind   19
4     1      parked near   19
..  ...              ...  ...
84   20   to the left of   22
85   21  to the right of   17
86   21  to the right of   18
87   21   to the left of    0
88   22  to the right of   20

[89 rows x 3 columns]