Is the fence in the bottom of the picture?
Yes, the fence is in the bottom of the image.
    src        edge_attr  dst
0     0  to the right of    9
1     0  to the right of    7
2     0   to the left of    4
3     0   to the left of   10
4     1   to the left of    8
5     1   to the left of   14
6     4  to the right of   15
7     4  to the right of    0
8     7   to the left of   15
9     7   to the left of    8
10    7   to the left of    0
11    8  to the right of    9
12    8  to the right of    1
13    8  to the right of   12
14    8  to the right of    7
15    9   to the left of   15
16    9   to the left of    8
17    9   to the left of    0
18   10  to the right of    0
19   10  to the right of   15
20   11   to the left of   13
21   11             near   12
22   12   to the left of    8
23   12   to the left of   14
24   12          next to   11
25   13  to the right of   11
26   14  to the right of    1
27   14  to the right of   12
28   15   to the left of   10
29   15  to the right of    9
30   15   to the left of    4
31   15  to the right of    7