Which material makes up the door, wood or metal?
The door is made of wood.
    src        edge_attr  dst
0     0   to the left of    2
1     0   to the left of    1
2     0   to the left of    3
3     1  to the right of    2
4     1  to the right of    0
5     1  to the right of    5
6     2  to the right of    5
7     2  to the right of    0
8     2   to the left of    3
9     2   to the left of    1
10    3               on    1
11    3  to the right of    2
12    3  to the right of    0
13    3  to the right of    5
14    3   to the left of    8
15    3  to the right of   12
16    4  to the right of   10
17    5   to the left of    1
18    5   to the left of    2
19    5   to the left of    3
20    5   to the left of   10
21    5               on    1
22    7   to the left of   12
23    8  to the right of    3
24    9  to the right of   13
25   10  to the right of    5
26   10   to the left of    4
27   11  to the right of   15
28   11  to the right of   13
29   11               on    6
30   12               on    1
31   12   to the left of    3
32   12  to the right of    7
33   13   to the left of    9
34   13   to the left of   11
35   15               on   12
36   15   to the left of   11