What device is the wall behind of, a speaker or a computer?
The wall is behind a computer.
    src        edge_attr  dst
0     1  to the right of    5
1     1            below    4
2     2               on    0
3     2       sitting on    0
4     2             near    7
5     2      in front of    5
6     4  to the right of    5
7     5   to the left of    4
8     5           behind    2
9     5   to the left of    1
10    6       sitting on    0
11    6         lying on    0
12    6  to the right of    7
13    7               on    0
14    7   to the left of    6
15    7          next to    2