Is the green sign on the black fence?
Yes, the sign is on the fence.
    src        edge_attr  dst
0     1   to the left of    2
1     2   to the left of    9
2     2  to the right of    1
3     2   to the left of    8
4     4   to the left of    8
5     4   to the left of    9
6     5               at   11
7     8  to the right of    4
8     8  to the right of   11
9     8  to the right of    9
10    8  to the right of    2
11    9               on    8
12    9  to the right of    4
13    9   to the left of    8
14    9  to the right of    2
15    9  to the right of   11
16   10  to the right of   12
17   11   to the left of    9
18   11   to the left of    8
19   12   to the left of   10