Which place is it?
It is a city.
    src        edge_attr  dst
0     0   to the left of   18
1     0   to the left of   17
2     0  to the right of   21
3     0   to the left of    9
4     0  to the right of    7
..  ...              ...  ...
81   21   to the left of    9
82   21   to the left of   18
83   21   to the left of   17
84   21   to the left of    1
85   21   to the left of    0

[86 rows x 3 columns]