What is the name of the black device?
The device is a camera.
    src        edge_attr  dst
0     1   to the left of   14
1     1   to the left of   12
2     1   to the left of    7
3     1   to the left of    5
4     1   to the left of   11
5     1   to the left of    8
6     3   to the left of   12
7     3   to the left of   14
8     3   to the left of   11
9     5  to the right of    1
10    5  to the right of   10
11    7  to the right of    1
12    7  to the right of   10
13    8  to the right of    1
14    8  to the right of   10
15   10   to the left of    7
16   10   to the left of    8
17   10   to the left of    5
18   11  to the right of    1
19   11  to the right of    3
20   12  to the right of    3
21   12  to the right of    1
22   14  to the right of    3
23   14  to the right of    1