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