What device is silver?
The device is a monitor.
    src        edge_attr  dst
0     0  to the right of    3
1     2           behind    6
2     3   to the left of    6
3     3           behind    6
4     3   to the left of    0
5     4  to the right of    6
6     6   to the left of    4
7     6      in front of    3
8     6      in front of    2
9     6               on    5
10    6           behind    7
11    6  to the right of    3
12    7               on    5
13    7      in front of    6