What is the fence made of?
The fence is made of metal.
    src        edge_attr  dst
0     0   to the left of   18
1     1  to the right of   14
2     1  to the right of   12
3     1   to the left of    3
4     1  to the right of    6
..  ...              ...  ...
87   18   to the left of   13
88   18  to the right of    8
89   18  to the right of    6
90   18   to the left of    7
91   18   to the left of   17

[92 rows x 3 columns]