Which place is it?
It is a shore.
    src        edge_attr  dst
0     0   to the left of   10
1     0  to the right of   16
2     0  to the right of    4
3     0  to the right of    3
4     0  to the right of   12
..  ...              ...  ...
67   18  to the right of   16
68   18               of   12
69   21   to the left of   17
70   22               of   12
71   22  to the right of   16

[72 rows x 3 columns]