Which kind of furniture is wooden?
The furniture is a desk.
    src        edge_attr  dst
0     0  to the right of    3
1     3   to the left of   11
2     3   to the left of   10
3     3            above    9
4     3   to the left of    0
5     4   to the left of   11
6     4  to the right of    7
7     5               on    6
8     5   to the left of   10
9     5  to the right of    7
10    5   to the left of   11
11    7   to the left of    4
12    7   to the left of    5
13    8      filled with    4
14    8  to the right of    9
15    8               on    6
16    9            under    3
17    9   to the left of    8
18   10  to the right of    3
19   10  to the right of    5
20   11  to the right of    3
21   11  to the right of    4
22   11  to the right of    5
23   11               on    6