Which kind of device is not black?
The device is a keyboard.
    src        edge_attr  dst
0     0            above    4
1     0               on    4
2     0  to the right of    6
3     0  to the right of    9
4     2  to the right of    9
5     2  to the right of    7
6     3               on    4
7     3  to the right of    9
8     4             near   12
9     4            below   13
10    4            under   13
11    4            below    0
12    4  to the right of    7
13    4  to the right of    6
14    5             near   12
15    6   to the left of    0
16    6   to the left of    4
17    7   to the left of    2
18    7   to the left of    4
19    9   to the left of    0
20    9   to the left of   13
21    9   to the left of    2
22    9   to the left of    3
23   12             near    4
24   12             near   13
25   12          wearing    1
26   12       sitting in    6
27   12             near    5
28   13  to the right of    9
29   13            above    4
30   13               on    4
31   13             near   12