Which kind of furniture is not wooden?
The furniture is a chair.
    src        edge_attr  dst
0     0  to the right of    6
1     0               on    2
2     1   to the left of   14
3     1  to the right of    9
4     3           behind   12
5     4  to the right of    7
6     4   to the left of    9
7     5               at    3
8     5  to the right of    7
9     5   to the left of    9
10    5  to the right of   12
11    6  to the right of   12
12    6   to the left of    0
13    7   to the left of   15
14    7   to the left of    4
15    7   to the left of    5
16    7   to the left of    9
17    7               on    8
18    9   to the left of   10
19    9  to the right of    5
20    9  to the right of    4
21    9   to the left of    1
22    9  to the right of    7
23    9  to the right of   12
24    9   to the left of   14
25   10  to the right of    9
26   10          wearing    1
27   10   to the left of   14
28   10               at    3
29   11        on top of   13
30   11               on    2
31   11            above   13
32   12   to the left of    5
33   12   to the left of    6
34   12      in front of    3
35   12   to the left of    9
36   13               on    2
37   13            under   11
38   14  to the right of    1
39   14  to the right of   10
40   14  to the right of    9
41   15  to the right of    7