Are there any black windows or doors?
No, there is a door but it is white.
    src        edge_attr  dst
0     0   to the left of    8
1     0           behind    7
2     1   to the left of    8
3     2           behind    9
4     4   to the left of    8
5     5          holding    6
6     7               on    9
7     7      in front of    9
8     7   to the left of    8
9     8  to the right of    7
10    8  to the right of    1
11    8           behind    9
12    8  to the right of    4
13    8  to the right of    0
14    9          holding    6
15    9           behind    7
16    9      in front of    8
17    9      in front of    2