What is the piece of furniture to the right of the blue couch?
The piece of furniture is a chair.
    src        edge_attr  dst
0     0   to the left of    3
1     1   to the left of    3
2     2  to the right of   17
3     2   to the left of   12
4     2           behind    6
5     3  to the right of   11
6     3   to the left of    7
7     3  to the right of    4
8     3  to the right of    0
9     3  to the right of    1
10    4               on    6
11    4     playing with   11
12    4          holding   11
13    4   to the left of    3
14    4       sitting on    6
15    5           inside    2
16    5  to the right of   17
17    6   to the left of    8
18    6   to the left of   10
19    6      in front of    2
20    6   to the left of   13
21    6   to the left of    7
22    7  to the right of    6
23    7  to the right of   10
24    7  to the right of    3
25    8  to the right of    6
26    8               on   15
27   10   to the left of    7
28   10  to the right of    6
29   11   to the left of    3
30   12  to the right of   14
31   12  to the right of    2
32   13  to the right of    6
33   14  to the right of   17
34   14   to the left of   12
35   17   to the left of    5
36   17   to the left of   14
37   17   to the left of   18
38   17   to the left of    2
39   18               on   17
40   18  to the right of   17