Which kind of device is it?
The device is a computer monitor.
    src        edge_attr  dst
0     0  to the right of   11
1     0  to the right of   10
2     0  to the right of    1
3     0  to the right of    2
4     0   to the left of    3
5     0  to the right of   12
6     1               of    1
7     1   to the left of    9
8     1   to the left of    5
9     1   to the left of    0
10    2   to the left of    0
11    3  to the right of    0
12    4   to the left of    6
13    5  to the right of    1
14    6  to the right of    4
15    7  to the right of   11
16    9  to the right of    1
17   10   to the left of    0
18   11   to the left of    7
19   11   to the left of    0
20   12   to the left of    0
21   12               in    8