Is there a fence in front of the tree?
No, there is a skier in front of the tree.
     src        edge_attr  dst
0      0   to the left of   22
1      0   to the left of   17
2      1   to the left of    5
3      1   to the left of    8
4      1  to the right of    6
..   ...              ...  ...
152   24               of    2
153   24   to the left of   17
154   25               of    2
155   25   to the left of   17
156   26               of    2

[157 rows x 3 columns]