What is the fence made of?
The fence is made of wood.
    src        edge_attr  dst
0     1   to the left of    5
1     1   to the left of    3
2     1   to the left of   13
3     1   to the left of    6
4     1   to the left of   11
5     2   to the left of    7
6     3   to the left of    4
7     3  to the right of    1
8     4  to the right of    5
9     4  to the right of    3
10    4  to the right of   13
11    4  to the right of    6
12    4  to the right of   14
13    4  to the right of   11
14    5   to the left of    4
15    5  to the right of    1
16    6  to the right of    1
17    6   to the left of    4
18    7  to the right of    2
19    8   to the left of    9
20    9  to the right of    8
21   11  to the right of    1
22   11   to the left of    4
23   13  to the right of    1
24   13   to the left of    4
25   13          wearing   11
26   13          wearing   14
27   14   to the left of    4