What device is gray?
The device is a camera.
    src        edge_attr  dst
0     0          wearing    7
1     0            below   12
2     0            under   12
3     0  to the right of   10
4     0               in    8
..  ...              ...  ...
60   12  to the right of   10
61   13   to the left of    6
62   13   to the left of    4
63   13   to the left of   12
64   13   to the left of   10

[65 rows x 3 columns]