What is the sign on?
The sign is on the pole.
    src        edge_attr  dst
0     0  to the right of    8
1     1  to the right of    8
2     2               on    8
3     4  to the right of    8
4     4   to the left of    5
5     4   to the left of   11
6     5   to the left of   11
7     5  to the right of    8
8     5  to the right of    4
9     6  to the right of    8
10    6   to the left of   11
11    6   to the left of    9
12    8   to the left of    6
13    8   to the left of    9
14    8   to the left of    0
15    8   to the left of    1
16    8   to the left of    4
17    8   to the left of    5
18    8   to the left of   12
19    9  to the right of    6
20    9   to the left of   11
21    9  to the right of    8
22    9  to the right of   12
23   11  to the right of    9
24   11  to the right of   12
25   11  to the right of    5
26   11  to the right of    4
27   11  to the right of    6
28   12  to the right of    8
29   12   to the left of   11
30   12   to the left of    9