What is the door in front of?
The door is in front of the curtain.
    src        edge_attr  dst
0     0   to the left of    5
1     0   to the left of    2
2     0   to the left of    1
3     0   to the left of    7
4     0               by    1
5     1            below    6
6     1  to the right of    0
7     1  to the right of   11
8     1  to the right of    8
9     2            above    7
10    2            below    6
11    2  to the right of    9
12    2               on    1
13    2  to the right of    8
14    2  to the right of    0
15    3   to the left of    8
16    3  to the right of    4
17    3   to the left of   10
18    3      in front of   10
19    4               by    3
20    4               on    9
21    4   to the left of    3
22    5  to the right of    0
23    6            above    2
24    6            above    1
25    6  to the right of    9
26    7  to the right of   11
27    7  to the right of    0
28    7            below    2
29    8               on    9
30    8   to the left of    1
31    8   to the left of    2
32    8  to the right of    3
33    9   to the left of    2
34    9   to the left of    6
35   10  to the right of    3
36   10           behind    3
37   11   to the left of    7
38   11   to the left of    1