What is the phone on?
The telephone is on the wall.
    src        edge_attr  dst
0     0   to the left of    2
1     0   to the left of    7
2     0   to the left of    3
3     0   to the left of    5
4     1  to the right of    7
5     1  to the right of    5
6     2   to the left of    5
7     2  to the right of    0
8     2   to the left of    7
9     3   to the left of   12
10    3   to the left of    7
11    3   to the left of    5
12    3  to the right of    0
13    4   to the left of    6
14    5  to the right of   10
15    5  to the right of    0
16    5  to the right of    3
17    5   to the left of   12
18    5   to the left of    1
19    5   to the left of   11
20    5  to the right of    2
21    6  to the right of    4
22    6   to the left of   11
23    6   to the left of   12
24    7  to the right of    2
25    7  to the right of    0
26    7  to the right of   10
27    7  to the right of    3
28    7   to the left of   12
29    7   to the left of    1
30    8               on    4
31    9   to the left of   12
32    9               on    6
33   10   to the left of    7
34   10   to the left of    5
35   11  to the right of    5
36   11               on   12
37   11  to the right of    6
38   12  to the right of    7
39   12  to the right of    3
40   12  to the right of    5
41   12  to the right of    6
42   12  to the right of    9