What is the device that is not gray?
The device is a keyboard.
    src        edge_attr  dst
0     0        on top of    5
1     0       sitting on   12
2     0   to the left of    7
3     0        on top of   12
4     0   to the left of   11
5     1   to the left of   13
6     1  to the right of    2
7     2   to the left of    1
8     4   to the left of   10
9     4   to the left of   11
10    4        on top of    5
11    4   to the left of    8
12    4   to the left of    7
13    7  to the right of    0
14    7  to the right of    4
15    8  to the right of    4
16    8        on top of    5
17    8      in front of   11
18   10        on top of    5
19   10   to the left of   11
20   10  to the right of    4
21   11  to the right of   12
22   11  to the right of   10
23   11           behind    8
24   11  to the right of    0
25   11  to the right of    4
26   12   to the left of   11
27   12        on top of    5
28   13  to the right of    1