Which place is it?
It is a station.
     src        edge_attr  dst
0      0   to the left of   21
1      0  to the right of   26
2      0   to the left of   24
3      0   to the left of    8
4      0  to the right of   18
..   ...              ...  ...
99    28  to the right of    1
100   28  to the right of    2
101   28  to the right of    3
102   28  to the right of    7
103   28   to the left of   20

[104 rows x 3 columns]