What animal are the trees behind of?
The trees are behind the zebra.
     src        edge_attr  dst
0      0   to the left of   22
1      0   to the left of   15
2      0   to the left of   16
3      0   to the left of   19
4      0  to the right of    6
..   ...              ...  ...
131   22  to the right of   15
132   22   to the left of   20
133   22   to the left of    1
134   22  to the right of    0
135   22   to the left of    8

[136 rows x 3 columns]