What's on the pole?
The streetlight is on the pole.
    src        edge_attr  dst
0     0               by    7
1     0          next to    7
2     0  to the right of   12
3     1   to the left of    6
4     2   to the left of   10
5     6  to the right of    1
6     7             near    0
7     8               of   15
8     8  to the right of   14
9     9               of   15
10    9   to the left of   14
11   10  to the right of    2
12   11               on   13
13   11   to the left of   15
14   12   to the left of    0
15   13   to the left of   18
16   13   to the left of   15
17   14  to the right of    9
18   14   to the left of    8
19   15      in front of   17
20   15               in    7
21   15  to the right of   11
22   15               in    5
23   15  to the right of   13
24   15          holding   18
25   16               of   15
26   17               on    4
27   17           behind   15
28   18  to the right of   13