Is this a mirror or a bed?
This is a mirror.
     src        edge_attr  dst
0      0   to the left of    1
1      0   to the left of   22
2      1  to the right of   27
3      1  to the right of    0
4      1  to the right of    9
..   ...              ...  ...
123   28   to the left of   15
124   28   to the left of   22
125   28   to the left of    9
126   28   to the left of   27
127   28   to the left of   23

[128 rows x 3 columns]