Is it indoors or outdoors?
It is indoors.
    src        edge_attr  dst
0     1   to the left of    9
1     2  to the right of   12
2     2  to the right of   15
3     3   to the left of    9
4     3   to the left of   15
5     4   to the left of    9
6     5               of    9
7     6  to the right of   11
8     6  to the right of   12
9     6  to the right of   15
10    7   to the left of   15
11    7   to the left of    9
12    8  to the right of   15
13    9  to the right of   11
14    9  to the right of    4
15    9  to the right of   15
16    9  to the right of    3
17    9  to the right of   12
18    9  to the right of    7
19    9  to the right of    1
20    9       looking in   12
21   11  to the right of   14
22   11   to the left of    9
23   11   to the left of    6
24   11   to the left of   15
25   12   to the left of    6
26   12   to the left of   13
27   12   to the left of    9
28   12   to the left of    2
29   13  to the right of   15
30   13  to the right of   12
31   14   to the left of   15
32   14   to the left of   11
33   15  to the right of    3
34   15   to the left of    8
35   15   to the left of    6
36   15  to the right of    7
37   15   to the left of    2
38   15   to the left of   13
39   15  to the right of   14
40   15  to the right of   11
41   15   to the left of    9