Which place is it?
It is a field.
    src        edge_attr  dst
0     0  to the right of   16
1     0  to the right of   17
2     1          holding    0
3     1  to the right of   13
4     1   to the left of    2
..  ...              ...  ...
59   21  to the right of   15
60   21  to the right of    6
61   21  to the right of    2
62   21  to the right of    9
63   21  to the right of    1

[64 rows x 3 columns]