What is the fence made of?
The fence is made of wood.
    src        edge_attr  dst
0     0  to the right of    5
1     0  to the right of    1
2     0               of    2
3     0  to the right of   10
4     1   to the left of   12
5     1   to the left of    5
6     1               of    2
7     1   to the left of    0
8     2  to the right of   11
9     2           eating    7
10    2      in front of   14
11    2            below    9
12    3               of    2
13    3   to the left of    8
14    3  to the right of   11
15    4               of    2
16    5  to the right of    1
17    5   to the left of    0
18    5   to the left of   12
19    6               of    2
20    6  to the right of    8
21    7               on   11
22    7            above   11
23    8               of    2
24    8  to the right of    3
25    8   to the left of   15
26    8   to the left of    6
27    9            above    2
28   10   to the left of    0
29   10               of    2
30   10   to the left of   12
31   11   to the left of    2
32   11   to the left of    3
33   12  to the right of    1
34   12  to the right of    5
35   12  to the right of   10
36   14           behind    2
37   15               of    2
38   15  to the right of    8