What size are the leaves?
The leaves are large.
    src        edge_attr  dst
0     0  to the right of   20
1     0  to the right of   12
2     0  to the right of    2
3     0  to the right of    8
4     0  to the right of    3
..  ...              ...  ...
79   19  to the right of    8
80   20   to the left of   16
81   20  to the right of   15
82   20   to the left of    0
83   20   to the left of    3

[84 rows x 3 columns]