Which kind of furniture is the keyboard on?
The keyboard is on the desk.
    src        edge_attr  dst
0     0  to the right of    1
1     0  to the right of    3
2     1   to the left of    7
3     1  to the right of    9
4     1  to the right of   14
5     1   to the left of    0
6     1  to the right of    3
7     1               on    0
8     1               on    3
9     2   to the left of    8
10    2               of    5
11    3   to the left of    1
12    3   to the left of    0
13    3   to the left of   10
14    3  to the right of   14
15    3   to the left of    7
16    4  to the right of   13
17    4   to the left of    5
18    4  to the right of   19
19    5   to the left of    8
20    5  to the right of    4
21    7  to the right of    1
22    7  to the right of    3
23    7  to the right of   14
24    7  to the right of   10
25    7               of   18
26    8               on   12
27    8  to the right of    2
28    8  to the right of    5
29    9   to the left of    1
30   10  to the right of   14
31   10  to the right of    3
32   10   to the left of    7
33   11  to the right of   20
34   13   to the left of    4
35   14   to the left of   10
36   14   to the left of    3
37   14   to the left of    1
38   14   to the left of    7
39   15  to the right of   20
40   19   to the left of    4
41   20               on   18
42   20   to the left of   11
43   20   to the left of   15