What kind of furniture is brown?
The furniture is a desk.
    src        edge_attr  dst
0     0               on    9
1     2  to the right of    7
2     2  to the right of   10
3     2  to the right of    3
4     2  to the right of    6
5     3   to the left of    2
6     3               of    0
7     3   to the left of    5
8     5  to the right of    3
9     6   to the left of   10
10    6   to the left of    2
11    6  to the right of   12
12    7   to the left of   13
13    7   to the left of    2
14   10  to the right of    6
15   10   to the left of    2
16   12   to the left of    6
17   13  to the right of    7
18   13               of    0