Which place is it?
It is a field.
    src        edge_attr  dst
0     0   to the left of   10
1     0   to the left of   13
2     0   to the left of   19
3     1               in   12
4     1  to the right of   14
..  ...              ...  ...
80   20   to the left of   10
81   20               of    1
82   20   to the left of   13
83   20  to the right of    2
84   20  to the right of   11

[85 rows x 3 columns]