What device is black?
The device is a printer.
    src        edge_attr  dst
0     0   to the left of   10
1     0   to the left of    6
2     1   to the left of   13
3     1   to the left of   12
4     1  to the right of    9
5     2  to the right of    4
6     4   to the left of    7
7     4   to the left of   12
8     4       sitting on    1
9     4   to the left of    6
10    4   to the left of    2
11    4   to the left of   13
12    5               of   12
13    6  to the right of    0
14    6  to the right of    7
15    6  to the right of    4
16    7   to the left of    6
17    7  to the right of    4
18    8   to the left of   10
19    9   to the left of    1
20   10  to the right of    0
21   10  to the right of    8
22   11   to the left of   13
23   11   to the left of   12
24   12  to the right of   11
25   12  to the right of    1
26   12  to the right of    4
27   12          wearing    6
28   12          wearing   10
29   13  to the right of   11
30   13  to the right of    4
31   13               of   12
32   13  to the right of    1