Which color are the trees that the leaves are on?
The trees are brown.
     src        edge_attr  dst
0      0   to the left of    1
1      1  to the right of    0
2      1  to the right of    2
3      1  to the right of    9
4      1   to the left of   10
..   ...              ...  ...
170   23  to the right of    1
171   24  to the right of    4
172   24  to the right of    1
173   24  to the right of   16
174   24  to the right of   13

[175 rows x 3 columns]