What are the stairs in front of?
The stairs are in front of the doorway.
    src        edge_attr  dst
0     0      in front of   18
1     1  to the right of   16
2     1  to the right of   12
3     1   to the left of    5
4     3   to the left of   17
5     4   to the left of   14
6     4   to the left of   15
7     4   to the left of   18
8     5  to the right of    8
9     5  to the right of   16
10    5  to the right of    1
11    5  to the right of   12
12    7  to the right of   18
13    7  to the right of   15
14    8  to the right of   16
15    8   to the left of    5
16   10           beside    9
17   10               on    6
18   12  to the right of   16
19   12   to the left of    1
20   12   to the left of    5
21   14   to the left of   18
22   14  to the right of    4
23   14   to the left of   15
24   15  to the right of    4
25   15   to the left of    7
26   15  to the right of   14
27   16   to the left of   12
28   16   to the left of    8
29   16   to the left of    1
30   16   to the left of    5
31   17  to the right of    3
32   18  to the right of   14
33   18   to the left of    7
34   18  to the right of    4
35   18           behind    0