What is the fence made of?
The fence is made of metal.
     src        edge_attr  dst
0      0  to the right of   23
1      0  to the right of   22
2      0   to the left of   30
3      0  to the right of   24
4      0   to the left of    6
..   ...              ...  ...
150   30  to the right of   22
151   30  to the right of   27
152   30  to the right of    7
153   30  to the right of    9
154   30  to the right of   10

[155 rows x 3 columns]