What kind of furniture is gray?
The furniture is a chair.
    src        edge_attr  dst
0     0   to the left of    3
1     0   to the left of   12
2     0   to the left of    9
3     1   to the left of   12
4     1   to the left of    4
5     1   to the left of    3
6     2   to the left of   14
7     2  to the right of   10
8     2  to the right of    4
9     2  to the right of    9
10    3  to the right of    0
11    3   to the left of    5
12    3   to the left of   16
13    3  to the right of    1
14    4  to the right of    1
15    4   to the left of    2
16    5  to the right of    3
17    5  to the right of   12
18    6               on   12
19    6   to the left of   15
20    6   to the left of   13
21    7   to the left of    9
22    7   to the left of   12
23    8   to the left of   15
24    9  to the right of    7
25    9   to the left of    2
26    9  to the right of    0
27    9   to the left of   10
28   10   to the left of    2
29   10  to the right of    9
30   12   to the left of   15
31   12  to the right of    0
32   12  to the right of    7
33   12   to the left of   16
34   12  to the right of    1
35   12   to the left of    5
36   12   to the left of   14
37   12               in   11
38   12               in   14
39   13               in   11
40   13  to the right of    6
41   14  to the right of    2
42   14  to the right of   12
43   15  to the right of    8
44   15  to the right of   12
45   15  to the right of    6
46   16  to the right of    3
47   16  to the right of   12
48   16   on the side of   15