What kind of device is on the wall?
The device is a screen.
     src        edge_attr  dst
0      0   to the left of    2
1      0   to the left of   13
2      0   to the left of    5
3      0  to the right of   16
4      0  to the right of   17
..   ...              ...  ...
152   23   to the left of    0
153   23   to the left of    9
154   23   to the left of   19
155   23   to the left of    2
156   23   to the left of   20

[157 rows x 3 columns]