Which kind of furniture is made of wood?
The furniture is a chair.
    src        edge_attr  dst
0     0   to the left of   10
1     1   to the left of    7
2     2   to the left of   10
3     3   to the left of   14
4     3   to the left of    7
5     4   to the left of    9
6     4   to the left of    6
7     4   to the left of    5
8     5  to the right of   13
9     5  to the right of    4
10    6  to the right of    4
11    6       sitting on    0
12    6  to the right of   13
13    6  to the right of   15
14    7               in   12
15    7  to the right of    8
16    7  to the right of   13
17    7  to the right of    1
18    7  to the right of    3
19    8   to the left of    7
20    8   to the left of   14
21    8   to the left of   13
22    9  to the right of    4
23    9  to the right of   13
24   10  to the right of    0
25   10  to the right of    2
26   10  to the right of   16
27   10  to the right of   15
28   11  to the right of   14
29   13   to the left of    6
30   13   to the left of    7
31   13  to the right of    8
32   13   to the left of    9
33   13   to the left of    5
34   14  to the right of    8
35   14   to the left of   11
36   14  to the right of    3
37   15   to the left of   10
38   15   to the left of    6
39   16   to the left of   10
40   16               on    2