What is the device that is to the right of the curtains on the left side?
The device is a controller.
     src       edge_attr  dst
0      0  to the left of    6
1      0  to the left of    8
2      0  to the left of   14
3      0  to the left of    5
4      0  to the left of   20
..   ...             ...  ...
127   22  to the left of   19
128   22  to the left of   20
129   22  to the left of    4
130   22  to the left of    5
131   22  to the left of    8

[132 rows x 3 columns]