Which place is it?
It is a forest.
     src        edge_attr  dst
0      0   to the left of    9
1      0   to the left of   32
2      1  to the right of    5
3      1  to the right of    9
4      1  to the right of   30
..   ...              ...  ...
103   35   to the left of   26
104   36   to the left of   22
105   36   to the left of    1
106   37   to the left of   17
107   37   to the left of    9

[108 rows x 3 columns]