Which kind of furniture is made of wood?
The furniture is a desk.
    src        edge_attr  dst
0     0  to the right of    2
1     0  to the right of   14
2     0  to the right of    1
3     0  to the right of    8
4     1   to the left of   13
5     1   to the left of    6
6     1   to the left of    0
7     1   to the left of    9
8     1   to the left of   10
9     2   to the left of    9
10    2   to the left of    0
11    2               on    1
12    2   to the left of   10
13    3               on    6
14    3        on top of    0
15    3  to the right of    7
16    3  to the right of    4
17    3  to the right of   11
18    4   to the left of    3
19    4  to the right of    8
20    4               on    7
21    4  to the right of   12
22    5   to the left of    8
23    5   to the left of    7
24    6  to the right of    1
25    6  to the right of    8
26    6  to the right of    7
27    7   to the left of   11
28    7   to the left of    3
29    7  to the right of    5
30    7   to the left of   13
31    7  to the right of   12
32    7  to the right of    8
33    7   to the left of    6
34    8  to the right of   12
35    8   to the left of    0
36    8   to the left of    6
37    8   to the left of    7
38    8   to the left of    4
39    8   to the left of   13
40    8   to the left of   11
41    8  to the right of    5
42    9  to the right of   14
43    9  to the right of    1
44    9  to the right of    2
45   10  to the right of   14
46   10  to the right of    1
47   10  to the right of    2
48   11  to the right of    7
49   11   to the left of    3
50   11  to the right of    8
51   12   to the left of    8
52   12   to the left of    4
53   12   to the left of    7
54   13  to the right of    8
55   13  to the right of    7
56   13  to the right of    1
57   14   to the left of   10
58   14   to the left of    9
59   14   to the left of    0