What is the horse standing behind of?
The horse is standing behind the fence.
    src        edge_attr  dst
0     1   to the left of    7
1     1               of    1
2     1               on   13
3     2  to the right of    3
4     2  to the right of   18
..  ...              ...  ...
68   18   to the left of   12
69   18   to the left of   13
70   18               on    3
71   18   to the left of    4
72   18   to the left of    2

[73 rows x 3 columns]