Which color is the shelf on the right of the picture?
The shelf is brown.
    src        edge_attr  dst
0     2               on    3
1     2   to the left of   16
2     2   to the left of   13
3     2   to the left of   17
4     3   to the left of   16
5     3   to the left of   17
6     3   to the left of   13
7     4   to the left of    8
8     4   to the left of    9
9     4   to the left of   14
10    5   to the left of   17
11    5   to the left of   16
12    5  to the right of   11
13    6   to the left of   13
14    6   to the left of    7
15    7  to the right of    6
16    8  to the right of    4
17    8            above    9
18    9  to the right of    4
19    9       underneath    8
20    9            below    8
21   11   to the left of    5
22   11   to the left of   17
23   11   to the left of   16
24   12        on top of    1
25   13  to the right of    3
26   13  to the right of    6
27   13  to the right of    2
28   14  to the right of    4
29   15               on   13
30   16  to the right of    3
31   16  to the right of    2
32   16  to the right of    5
33   16  to the right of   11
34   17  to the right of    5
35   17  to the right of   11
36   17  to the right of    3
37   17  to the right of    2