What device is in front of the wall?
The device is a computer.
    src        edge_attr  dst
0     0   to the left of    3
1     0             near   10
2     1  to the right of   10
3     1  to the right of    8
4     2  to the right of   10
5     2   to the left of    9
6     3           behind   10
7     3   to the left of    9
8     3  to the right of    0
9     4   to the left of    9
10    4   to the left of    7
11    4   to the left of   12
12    5               on    6
13    5  to the right of   10
14    5   to the left of    9
15    7  to the right of    4
16    7  to the right of   10
17    8   to the left of    9
18    8   to the left of    1
19    9  to the right of    5
20    9  to the right of   11
21    9  to the right of    2
22    9  to the right of    4
23    9  to the right of    3
24    9  to the right of   10
25    9  to the right of    8
26   10      in front of    3
27   10             near    0
28   10   to the left of    5
29   10   to the left of    7
30   10   to the left of    2
31   10   to the left of   12
32   10   to the left of    1
33   10   to the left of    9
34   11   to the left of    9
35   12  to the right of    4
36   12  to the right of   10