What device isn't on?
The device is a screen.
    src        edge_attr  dst
0     1  to the right of   14
1     1   to the left of   15
2     1  to the right of   17
3     1   to the left of    2
4     1   to the left of   19
..  ...              ...  ...
63   19  to the right of   10
64   20   to the left of   19
65   20  to the right of   13
66   20  to the right of   10
67   20  to the right of    6

[68 rows x 3 columns]