Are both the pole and the fence made of the same material?
Yes, both the pole and the fence are made of wood.
   src        edge_attr  dst
0    0  to the right of    4
1    1  to the right of    4
2    2  to the right of    7
3    2  to the right of    6
4    2  to the right of    5
5    4   to the left of    0
6    4   to the left of    1
7    5   to the left of    2
8    6   to the left of    2
9    7   to the left of    2