What is sitting on the table that is made of wood?
The glass is sitting on the table.
    src        edge_attr  dst
0     0   to the left of    6
1     1               of    9
2     1       sitting on   12
3     1   to the left of    8
4     6   to the left of    7
5     6  to the right of    0
6     6  to the right of   11
7     6               on    5
8     7  to the right of    6
9     7               on    5
10    7  to the right of   11
11    8  to the right of    9
12    8  to the right of    1
13    9   to the left of    8
14   11   to the left of    7
15   11               of    0
16   11       sitting on    4
17   11   to the left of    6