What is the device that is sitting on top of the table?
The device is a keyboard.
    src          edge_attr  dst
0     0     to the left of    6
1     0    to the right of   11
2     0     to the left of    3
3     0     to the left of   17
4     0    to the right of   10
5     1    to the right of    2
6     2    to the right of    8
7     2     to the left of    1
8     3    to the right of    0
9     3    lying on top of   16
10    3    to the right of    9
11    3    to the right of    7
12    4    to the right of    7
13    4    to the right of    9
14    6    to the right of    7
15    6    to the right of    0
16    6     to the left of   17
17    7  sitting on top of   16
18    7     to the left of    3
19    7     to the left of   17
20    7    to the right of   10
21    7     to the left of    4
22    7    to the right of   11
23    7     to the left of    6
24    8     to the left of    2
25    9     to the left of    4
26    9     to the left of    3
27   10     to the left of    0
28   10     to the left of    7
29   11     to the left of    7
30   11     to the left of    0
31   13     to the left of   15
32   13     to the left of   18
33   15    to the right of   13
34   17    to the right of    7
35   17    to the right of    6
36   17    to the right of    0
37   18    to the right of   13