Which kind of furniture is made of wood?
The furniture is a table.
    src        edge_attr  dst
0     0               on    5
1     0  to the right of    1
2     0  sitting next to    7
3     1           behind    7
4     1  sitting next to    7
5     1   to the left of    0
6     1  to the right of    4
7     2   to the left of    8
8     2   to the left of    6
9     4           behind    7
10    4   to the left of    7
11    4   to the left of    1
12    6  to the right of    2
13    7  to the right of    4
14    7        on top of    5
15    7      in front of    4
16    7      in front of    1
17    8               on    5
18    8  lying on top of    5
19    8        on top of    5
20    8  to the right of    2