Which kind of device is the person using?
The person is using a mobile phone.
    src        edge_attr  dst
0     1   to the left of   12
1     2   to the left of   12
2     3   to the left of   12
3     4  to the right of   14
4     4  sitting next to   14
5     4  to the right of    6
6     5   to the left of    6
7     5  to the right of   11
8     6  to the right of    5
9     6   to the left of    4
10    9   to the left of   12
11   10  to the right of   11
12   11   to the left of    5
13   11  growing next to    7
14   11   to the left of   10
15   11   to the left of   14
16   12  to the right of    2
17   12  to the right of    9
18   12  to the right of    3
19   12  to the right of    1
20   12  to the right of   13
21   13   to the left of   12
22   14          wearing    6
23   14            using    3
24   14          wearing   10
25   14  to the right of   11
26   14   to the left of    4