What items of furniture are brown?
The pieces of furniture are chairs.
    src        edge_attr  dst
0     0          wearing    7
1     0          wearing    4
2     0       sitting on    9
3     0   to the left of    6
4     1   to the left of   10
5     1  to the right of    3
6     2               on    9
7     3   to the left of    8
8     3   to the left of    5
9     3   to the left of   10
10    3           behind    9
11    3   to the left of    1
12    5           behind    9
13    5           behind   10
14    5  to the right of    3
15    5   to the left of   10
16    5   to the left of    6
17    6  to the right of    5
18    6           behind    9
19    6  to the right of    0
20    7   to the left of   10
21    8  to the right of    3
22    8   to the left of   10
23   10  to the right of    7
24   10  to the right of    8
25   10      in front of    5
26   10  to the right of    1
27   10  to the right of    3
28   10  to the right of    5
29   10               on    9