Which kind of device is to the left of the computer?
The device is a phone.
    src        edge_attr  dst
0     0   to the left of    5
1     0  to the right of    4
2     3  to the right of    4
3     4   to the left of    3
4     4   to the left of    6
5     4   to the left of    0
6     5  to the right of    6
7     5               on    9
8     5  to the right of   11
9     5  to the right of    0
10    6   to the left of   11
11    6               on    7
12    6   to the left of    5
13    6  to the right of    4
14    6  to the right of   12
15   10   to the left of   13
16   11  to the right of    6
17   11   to the left of    5
18   12   to the left of    6
19   13  to the right of   10