Do you see any nightstands to the left of the controller on the left?
No, there is a lamp to the left of the controller.
    src        edge_attr  dst
0     0   to the left of   16
1     0   to the left of   12
2     0   to the left of   15
3     1   to the left of    4
4     1  to the right of    9
..  ...              ...  ...
79   17  to the right of   13
80   19   to the left of    7
81   19  to the right of    3
82   20  to the right of   13
83   20  to the right of    9

[84 rows x 3 columns]