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