What is the fence made of?
The fence is made of wood.
     src        edge_attr  dst
0      0          next to    4
1      0             near    4
2      0  to the right of   14
3      0  to the right of   12
4      0  to the right of   16
..   ...              ...  ...
147   21       walking on    4
148   21       grazing on    4
149   21   to the left of   20
150   21   to the left of   19
151   21               on    4

[152 rows x 3 columns]