Are there tables or bookcases that are made of wood?
No, there is a table but it is made of plastic.
    src        edge_attr  dst
0     0      surrounding    1
1     0           behind    1
2     1      in front of    0
3     1    surrounded by    0
4     2  to the right of    3
5     3   to the left of    2
6     3   to the left of   13
7     3   to the left of    4
8     4   to the left of   10
9     4  to the right of    3
10    5               on    1
11    7               by    1
12    8   to the left of   12
13    9               on   14
14   10               on    9
15   10  to the right of    4
16   12  to the right of    8
17   13  to the right of    3
18   13               by    6