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