What kind of furniture is behind the vase that is holding the flowers?
The piece of furniture is a couch.
    src        edge_attr  dst
0     0   to the left of    6
1     2               in    3
2     2  to the right of    5
3     3      in front of    8
4     3             with    2
5     3               on   10
6     3          holding    2
7     3   to the left of    7
8     4   to the left of    9
9     4           behind    8
10    5   to the left of    2
11    6  to the right of    0
12    6      in front of    8
13    7               by    8
14    7  to the right of    3
15    7  to the right of    8
16    8   to the left of    7
17    8           behind    6
18    8           behind    3
19    8      in front of    4
20    9  to the right of    4