Which kind of furniture is behind the cat?
The pieces of furniture are chairs.
    src        edge_attr  dst
0     0   to the left of    1
1     0   to the left of    6
2     1           behind    2
3     1  to the right of    8
4     1  to the right of   10
5     1  to the right of    0
6     1  to the right of    7
7     1  to the right of    3
8     2      in front of    3
9     2      in front of    1
10    2             near    3
11    2  to the right of    3
12    2               on    5
13    2          next to    3
14    3   to the left of    6
15    3          next to    2
16    3           behind    2
17    3   to the left of    9
18    3   to the left of    8
19    3   to the left of    1
20    3   to the left of    2
21    3   to the left of    4
22    3             near    2
23    4  to the right of    3
24    4  to the right of    7
25    6  to the right of    3
26    6  to the right of    0
27    7   to the left of    4
28    7   to the left of    1
29    8   to the left of    1
30    8  to the right of    3
31    9  to the right of    3
32   10   to the left of    1