Which place is it?
It is a plain.
    src        edge_attr  dst
0     2   to the left of   12
1     2   to the left of    5
2     3   to the left of   13
3     3  to the right of    6
4     3   to the left of    9
..  ...              ...  ...
75   25   to the left of   23
76   25  to the right of   19
77   25   to the left of    9
78   25  to the right of    7
79   25  to the right of    6

[80 rows x 3 columns]