What type of device is behind the laptop that is not unopened?
The device is a speaker.
    src        edge_attr  dst
0     0           behind   11
1     0               on    7
2     0          next to   11
3     0  to the right of    3
4     0   to the left of    8
5     0             near   11
6     1           behind   11
7     1  to the right of    8
8     1               on    7
9     1   to the left of    5
10    2          next to   11
11    2             near   11
12    2           beside   11
13    3   to the left of    0
14    3           behind   11
15    3               on    7
16    3   to the left of   11
17    3   to the left of    8
18    3   to the left of    6
19    4           behind    7
20    4           behind   11
21    5  to the right of    1
22    5               on    7
23    5           behind   11
24    5  to the right of   11
25    5  to the right of    8
26    6   on the side of   11
27    6   to the left of   10
28    6  to the right of    3
29    7      in front of    4
30    7            below   11
31    7            under   11
32    8  to the right of    0
33    8   to the left of    1
34    8   to the left of    5
35    8  to the right of    3
36   10  to the right of    6
37   11               on    7
38   11      in front of    1
39   11             near    2
40   11      in front of    0
41   11             near    0
42   11      in front of    4
43   11   to the left of    5
44   11      in front of    5
45   11            above    7
46   11      in front of    3
47   11  to the right of    3