What is the door made of?
The door is made of metal.
    src        edge_attr  dst
0     0               on   11
1     0   to the left of   10
2     0            above    1
3     1            below    0
4     1            under    0
5     1   to the left of   10
6     1  to the right of   12
7     1  to the right of    9
8     1               in    5
9     1            above    4
10    1  to the right of    3
11    1            below    8
12    2   to the left of    7
13    2   to the left of    8
14    3  to the right of   12
15    3   to the left of    1
16    3   to the left of    4
17    3               on    6
18    3   to the left of    7
19    4   to the left of   10
20    4  to the right of   12
21    4  to the right of    9
22    4  to the right of    3
23    4            under    1
24    6   to the left of   10
25    7  to the right of    2
26    7   to the left of   10
27    7  to the right of    3
28    7  to the right of    9
29    7  to the right of   12
30    8            above    1
31    8  to the right of    2
32    8   to the left of   10
33    8        on top of    1
34    9            below    1
35    9   to the left of    7
36    9   to the left of    1
37    9   to the left of    4
38   10  to the right of    7
39   10  to the right of    6
40   10  to the right of   11
41   10  to the right of    1
42   10  to the right of    0
43   10  to the right of    8
44   10  to the right of    4
45   11   to the left of   10
46   12   to the left of    7
47   12   to the left of    1
48   12   to the left of    3
49   12   to the left of    4