Are there either large windows or doors?
No, there is a window but it is small.
   src        edge_attr  dst
0    0               on    1
1    1   to the left of    9
2    1            below   11
3    1   to the left of    5
4    5  to the right of    1
5    7               on    3
6    7            below   10
7    9  to the right of    1
8   10            above    7
9   11            above    1