What is the fence behind of, a giraffe or a zebra?
The fence is behind a giraffe.
    src        edge_attr  dst
0     0  to the right of   13
1     0  to the right of    6
2     0               on   15
3     1   to the left of    3
4     1  to the right of   13
..  ...              ...  ...
68   14      in front of    4
69   14  to the right of    8
70   14  to the right of   12
71   14               in   15
72   14               on   15

[73 rows x 3 columns]