What is on the black pole?
The lamps are on the pole.
    src        edge_attr  dst
0     0  to the right of   20
1     1   to the left of   10
2     1   to the left of   22
3     1   to the left of   17
4     1   to the left of    5
..  ...              ...  ...
81   22  to the right of   10
82   22   to the left of    4
83   22   to the left of   21
84   22  to the right of    1
85   22  to the right of    5

[86 rows x 3 columns]