What color are the flowers of the tree?
The flowers are white.
     src        edge_attr  dst
0      0   to the left of    1
1      1  to the right of    0
2      1   to the left of   13
3      1   to the left of   12
4      2   to the left of   50
..   ...              ...  ...
681   66   to the left of   63
682   67   to the left of   11
683   67   to the left of   30
684   67   to the left of   22
685   67   to the left of   43

[686 rows x 3 columns]