What kind of device is to the left of the container?
The device is a monitor.
    src        edge_attr  dst
0     0   to the left of   17
1     0   to the left of   14
2     1   to the left of    9
3     1   to the left of   14
4     2  to the right of   14
5     2   to the left of   12
6     2   to the left of   16
7     2  to the right of   17
8     3   to the left of   12
9     4   to the left of   12
10    4   to the left of   19
11    5  to the right of   17
12    5  to the right of   18
13    6   to the left of    7
14    7             near    8
15    7  to the right of    6
16    8          next to    7
17    8  to the right of    9
18    9       sitting on   14
19    9  to the right of   11
20    9  to the right of    1
21    9  to the right of   10
22    9   to the left of    8
23   10   to the left of    9
24   10   to the left of   14
25   11   to the left of    9
26   12  to the right of    2
27   12  to the right of    4
28   12  to the right of    3
29   12  to the right of   17
30   12  to the right of   18
31   14  to the right of    0
32   14  to the right of   10
33   14   to the left of    2
34   14  to the right of    1
35   15   to the left of   17
36   16               on    7
37   16  to the right of   18
38   16  to the right of    2
39   17  to the right of    0
40   17   to the left of   19
41   17   to the left of    5
42   17   to the left of    2
43   17   to the left of   12
44   17  to the right of   15
45   18   to the left of   16
46   18   to the left of    5
47   18           inside   13
48   18   to the left of   12
49   19  to the right of   17
50   19  to the right of    4