What device is on the desk made of wood?
The device is a printer.
    src        edge_attr  dst
0     0   to the left of    5
1     0  to the right of    1
2     0  to the right of   10
3     1   to the left of    0
4     2   to the left of   11
5     2   to the left of    3
6     3  to the right of    7
7     3  to the right of    2
8     4  to the right of    9
9     4  to the right of    6
10    5  to the right of    0
11    6   to the left of    4
12    7               on    9
13    7   to the left of    3
14    7   to the left of   11
15    9   to the left of    4
16   10   to the left of    0
17   11               on    9
18   11  to the right of    7
19   11  to the right of    2
20   12               on    9