Is the sign different in color than the doorway?
Yes, the sign is red and the doorway is black.
    src        edge_attr  dst
0     0             with   11
1     1   to the left of   15
2     1   to the left of    8
3     1   to the left of   13
4     1   to the left of   10
5     2   to the left of    7
6     2  to the right of   10
7     2  to the right of    5
8     2  to the right of    8
9     2   to the left of    9
10    3   to the left of   12
11    3   to the left of   17
12    4               on    1
13    4   to the left of    8
14    4   to the left of   10
15    5   to the left of    2
16    5            below    6
17    6            above    5
18    6  to the right of   15
19    7  to the right of   10
20    7  to the right of    8
21    7  to the right of    2
22    8  to the right of   18
23    8   to the left of    2
24    8  to the right of    1
25    8  to the right of    4
26    8   to the left of    7
27    9  to the right of    2
28   10  to the right of    4
29   10   to the left of    2
30   10   to the left of    7
31   10  to the right of    1
32   10  to the right of   18
33   11               on    0
34   11               in    0
35   11               on    8
36   12  to the right of    3
37   13  to the right of    1
38   13               on   10
39   14               on    0
40   15   to the left of    6
41   15  to the right of    1
42   16               on    0
43   17  to the right of    3
44   18   to the left of   10
45   18   to the left of    8