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