Which place is it?
It is a city.
    src        edge_attr  dst
0     0  to the right of    4
1     0  to the right of   18
2     0  to the right of   21
3     0  to the right of    1
4     0  to the right of    3
..  ...              ...  ...
80   21   to the left of    5
81   21  to the right of    2
82   21               of    2
83   21               on   18
84   21   to the left of    0

[85 rows x 3 columns]