Which kind of furniture is not wooden?
The furniture is a chair.
    src        edge_attr  dst
0     0               on    1
1     0   to the left of    5
2     0   to the left of    3
3     2  to the right of   12
4     2   to the left of   17
5     2  to the right of   11
6     2  to the right of    6
7     2      in front of    5
8     3               on    1
9     3   to the left of    5
10    3  to the right of    0
11    4               on    1
12    4  to the right of   16
13    4  to the right of    9
14    5  to the right of    0
15    5  to the right of    3
16    5               on    1
17    5           behind    2
18    5  to the right of   20
19    6   to the left of    2
20    6               on    1
21    6   to the left of   18
22    6   to the left of   19
23    6  to the right of   13
24    8               on    1
25    8   to the left of   15
26    8   to the left of   14
27    8   to the left of   12
28    9   to the left of    4
29   10   to the left of   17
30   11   to the left of    2
31   12   to the left of   19
32   12  to the right of   15
33   12  to the right of   14
34   12               on    1
35   12   to the left of    2
36   12  to the right of    8
37   13   to the left of    6
38   14               on    1
39   14  to the right of    8
40   14   to the left of   12
41   15               on    1
42   15   to the left of   12
43   15  to the right of    8
44   16   to the left of    4
45   17  to the right of    2
46   17  to the right of   10
47   17  to the right of   19
48   18  to the right of    6
49   18   to the left of   19
50   19  to the right of   18
51   19   to the left of   17
52   19  to the right of    6
53   19  to the right of   20
54   19  to the right of   12
55   19               on    1
56   20               on    1
57   20   to the left of    5
58   20   to the left of   19