Which place is it?
It is a city.
    src       edge_attr  dst
0     0  to the left of   22
1     0  to the left of   19
2     0              on   15
3     0  to the left of   23
4     1              on   13
..  ...             ...  ...
73   25  to the left of   23
74   25  to the left of   22
75   25  to the left of   19
76   25  to the left of   11
77   25  to the left of   24

[78 rows x 3 columns]