What's the door made of?
The door is made of glass.
    src        edge_attr  dst
0     0  to the right of   13
1     0   to the left of   10
2     1   to the left of   10
3     2          next to   13
4     2  to the right of   13
5     2   to the left of   10
6     2             near   13
7     3   to the left of   10
8     3  to the right of   15
9     3  to the right of    7
10    7   to the left of   10
11    7  to the right of   15
12    7   to the left of    3
13    8   to the left of   10
14   10  to the right of    0
15   10  to the right of    2
16   10  to the right of    8
17   10  to the right of    3
18   10  to the right of    1
19   10  to the right of   13
20   10   to the left of   11
21   10  to the right of    7
22   11  to the right of   10
23   13   to the left of   10
24   13               on   14
25   13   to the left of    0
26   13   to the left of    2
27   13             near    2
28   15   to the left of    3
29   15   to the left of    7