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