Which place is it?
It is a zoo.
     src        edge_attr  dst
0      0   to the left of   25
1      0  to the right of    7
2      0  to the right of   30
3      1   to the left of   18
4      1  to the right of   27
..   ...              ...  ...
131   27   to the left of    1
132   28  to the right of   29
133   29   to the left of   28
134   30   to the left of    0
135   30   to the left of   15

[136 rows x 3 columns]