What animal is on the wall that is made of wood?
The cat is on the wall.
    src        edge_attr  dst
0     2               on    3
1     2         drinking    4
2     2   to the left of    5
3     2      in front of    5
4     2  to the right of    4
5     4   to the left of    2
6     4   to the left of    5
7     5           behind    2
8     5  to the right of    2
9     5  to the right of    4
10    7               on    0
11    8      in front of    9
12    9           behind    8