Which kind of furniture isn't purple?
The furniture is a desk.
    src        edge_attr  dst
0     0   to the left of   11
1     0   to the left of    8
2     0  to the right of    1
3     0   to the left of    5
4     1   to the left of    7
5     1   to the left of   14
6     1   to the left of   16
7     1   to the left of    2
8     1   to the left of    0
9     1   to the left of   18
10    2   to the left of   16
11    2  to the right of   12
12    2   to the left of    3
13    2  to the right of    1
14    3  to the right of    2
15    3  to the right of   14
16    3  to the right of   16
17    5  to the right of   17
18    5  to the right of   14
19    5  to the right of    0
20    5       sitting at   11
21    6   to the left of   17
22    7  to the right of   12
23    7  to the right of    1
24    7  to the right of    9
25    8  to the right of    0
26    8  to the right of   17
27    9   to the left of    7
28   10               on    4
29   11  to the right of    0
30   11  to the right of   17
31   12   to the left of   14
32   12   to the left of   18
33   12   to the left of    2
34   12   to the left of    7
35   14  to the right of    1
36   14   to the left of    3
37   14  to the right of   18
38   14   to the left of    5
39   14   to the left of   19
40   14  to the right of   12
41   16  to the right of    2
42   16   to the left of    3
43   16  to the right of    1
44   17   to the left of    5
45   17   to the left of   11
46   17  to the right of    6
47   17   to the left of    8
48   18  to the right of   12
49   18   to the left of   14
50   18  to the right of    1
51   19               on   11
52   19  to the right of   14