What kind of furniture is wooden?
The furniture is a bed.
    src        edge_attr  dst
0     0  to the right of    7
1     0               of    3
2     1  to the right of   10
3     1   to the left of    4
4     2   to the left of    7
5     2   to the left of    5
6     3               on   10
7     3               on   12
8     4  to the right of    1
9     4  to the right of   10
10    5  to the right of    2
11    5               of   12
12    7   to the left of    0
13    7  to the right of    2
14    7               of    3
15    8               of    3
16    9  to the right of   10
17   10               on   12
18   10   to the left of    4
19   10   to the left of    1
20   10   to the left of    9