How big are the trees?
The trees are large.
     src        edge_attr  dst
0      0   to the left of    9
1      0  to the right of   15
2      1   to the left of    4
3      1   to the left of    9
4      1  to the right of   13
..   ...              ...  ...
109   23  to the right of    9
110   23   to the left of    7
111   23   to the left of    3
112   24   to the left of    8
113   24   to the left of    9

[114 rows x 3 columns]