Is the gray fence made of wood?
No, the fence is made of metal.
    src        edge_attr  dst
0     0  to the right of    8
1     0   to the left of   10
2     1  to the right of    8
3     1  to the right of    3
4     3  to the right of    8
5     3   to the left of    1
6     6  to the right of    8
7     8   to the left of   10
8     8  to the right of   11
9     8   to the left of    1
10    8   to the left of    0
11    8   to the left of    3
12    8   to the left of    6
13   10  to the right of    8
14   10  to the right of    0
15   11   to the left of   13
16   11   to the left of    8
17   13  to the right of   11