Which color is the door?
The door is brown.
    src        edge_attr  dst
0     0  to the right of    3
1     0  to the right of    6
2     0   to the left of    2
3     1               on   10
4     2  to the right of    5
5     2  to the right of    0
6     3   to the left of    5
7     3   to the left of    6
8     3   to the left of    0
9     5   to the left of    2
10    5  to the right of    3
11    6   to the left of    0
12    6  to the right of    3
13    7               on   11
14    7   to the left of   13
15    9               in   14
16    9         lying on   13
17    9               on   13
18    9               on   14
19   11   to the left of   13
20   13               on   14
21   13  to the right of    7
22   13  to the right of   11