What is the device that is to the left of the device that is not off?
The device is a computer.
    src        edge_attr  dst
0     0  to the right of    1
1     0   to the left of    6
2     1   to the left of    6
3     1             near    9
4     1   to the left of    0
5     2   to the left of    4
6     2            under    3
7     2            below    3
8     3   to the left of    4
9     3            above    2
10    4               on    8
11    4  to the right of    3
12    4  to the right of    2
13    5   to the left of    6
14    6  to the right of    5
15    6  to the right of    1
16    6  to the right of    0
17    9             near    1