Are there any mirrors on the wall?
Yes, there is a mirror on the wall.
    src        edge_attr  dst
0     0  to the right of    3
1     0   to the left of    6
2     0   to the left of    5
3     0  to the right of    9
4     0  to the right of   11
..  ...              ...  ...
66   18   to the left of   11
67   18   to the left of    0
68   18          holding   16
69   19   to the left of    9
70   19   to the left of   10

[71 rows x 3 columns]