Is there any black bench or fence?
Yes, there is a black fence.
    src        edge_attr  dst
0     0  to the right of   11
1     0   to the left of   10
2     0  to the right of    5
3     1  to the right of    5
4     2  to the right of   12
5     2  to the right of    9
6     2  to the right of    6
7     3   to the left of    6
8     4   to the left of    6
9     4   to the left of   12
10    5   to the left of    1
11    5   to the left of    8
12    5   to the left of    0
13    6   to the left of   13
14    6  to the right of    4
15    6   to the left of    2
16    6  to the right of    3
17    7   to the left of    9
18    8  to the right of   11
19    8  to the right of    5
20    8   to the left of   10
21    9  to the right of    7
22    9   to the left of    2
23   10  to the right of    8
24   10  to the right of    0
25   11   to the left of    8
26   11   to the left of    0
27   12   to the left of    2
28   12  to the right of    4
29   13  to the right of    6