What is in front of the fence?
The trees are in front of the fence.
     src        edge_attr  dst
0      0  to the right of   28
1      0   to the left of   26
2      0  to the right of   29
3      0   to the left of   10
4      0  to the right of    7
..   ...              ...  ...
196   30  to the right of    2
197   30   to the left of   20
198   30   to the left of   14
199   30   to the left of   28
200   30  to the right of   21

[201 rows x 3 columns]