Are there any red flags or lamps?
Yes, there is a red lamp.
    src        edge_attr  dst
0     1           behind   12
1     1  to the right of   13
2     1  to the right of    2
3     1  to the right of    9
4     2   to the left of    1
5     2               on   13
6     2   to the left of    5
7     3  to the right of    4
8     3   to the left of    7
9     3   to the left of    8
10    3   to the left of   10
11    4   to the left of    3
12    4   to the left of   15
13    4             near   10
14    4   to the left of   10
15    4   to the left of    6
16    5  to the right of    9
17    5  to the right of    2
18    5  to the right of   13
19    6               of   10
20    6  to the right of    4
21    6   to the left of    8
22    6   to the left of    7
23    7  to the right of   15
24    7  to the right of    6
25    7  to the right of    3
26    8  to the right of    6
27    8  to the right of    3
28    8  to the right of   15
29    9   to the left of    1
30    9  to the right of   14
31    9   to the left of    5
32    9               on   10
33   10   to the left of   12
34   10  to the right of    3
35   10             near   12
36   10             near    4
37   10  to the right of   11
38   10  to the right of    4
39   11               on    3
40   11   to the left of   10
41   11   to the left of   14
42   12      in front of    1
43   12          next to   10
44   12  to the right of   10
45   12  to the right of   13
46   13   to the left of    5
47   13   to the left of    1
48   13   to the left of   12
49   14               on   10
50   14   to the left of    9
51   14  to the right of   11
52   15   to the left of    7
53   15  to the right of    4
54   15   to the left of    8