Do you see both mirrors and glasses?
No, there is a mirror but no glasses.
    src        edge_attr  dst
0     0   to the left of    1
1     0  to the right of    2
2     0   to the left of   16
3     0  to the right of   12
4     0   to the left of    8
..  ...              ...  ...
77   21  to the right of    7
78   21  to the right of   10
79   21  to the right of    3
80   21  to the right of   12
81   21  to the right of   15

[82 rows x 3 columns]