What is the wire on?
The wire is on the tree.
    src        edge_attr  dst
0     0   to the left of   23
1     0   to the left of   21
2     2   to the left of    9
3     2   to the left of    5
4     3   to the left of    8
..  ...              ...  ...
82   23  to the right of   15
83   23  to the right of   19
84   23  to the right of   10
85   23  to the right of   14
86   23  to the right of    0

[87 rows x 3 columns]