Does the fence look black?
No, the fence is white.
    src        edge_attr  dst
0     0  to the right of   12
1     1  to the right of   15
2     1           behind   15
3     2               by   12
4     2               at   12
5     3  to the right of   19
6     3  to the right of    6
7     3   to the left of    4
8     3             near   11
9     3               in   13
10    4  to the right of    3
11    4  to the right of   11
12    4  to the right of   18
13    4  to the right of    6
14    5  to the right of    7
15    5  to the right of    8
16    6   to the left of    3
17    6   to the left of    4
18    7   to the left of    5
19    8   to the left of    5
20    9   to the left of   16
21    9               by   10
22   11   to the left of    4
23   11             near    3
24   11   to the left of   14
25   12   to the left of    0
26   14  to the right of   11
27   15   to the left of    1
28   15      in front of    1
29   16  to the right of    9
30   17  to the right of   18
31   18   to the left of    4
32   18   to the left of   17
33   19   to the left of    3