Do you see fences or pictures?
Yes, there is a fence.
    src        edge_attr  dst
0     0   to the left of    2
1     0   to the left of    9
2     2   to the left of   12
3     2            below    1
4     2   to the left of    8
5     2  to the right of    0
6     4  to the right of    7
7     4   to the left of   12
8     5   to the left of    8
9     6           behind   12
10    7   to the left of    4
11    8  to the right of    2
12    8  to the right of    5
13    8  to the right of   11
14    9  to the right of    0
15   11   to the left of    8
16   12  to the right of    2
17   12      in front of    6
18   12  to the right of    4