What's on the wall?
The mirror is on the wall.
     src        edge_attr  dst
0      0   to the left of   22
1      0   to the left of   21
2      0   to the left of   15
3      1  to the right of   12
4      1   to the left of   17
..   ...              ...  ...
135   25               on   12
136   26  to the right of    4
137   26  to the right of    6
138   26  to the right of    7
139   26   to the left of   16

[140 rows x 3 columns]