What is the color of the sand?
The sand is black.
    src        edge_attr  dst
0     2   to the left of   16
1     3          holding    2
2     3   to the left of   11
3     3          wearing    4
4     3  to the right of    9
5     3   to the left of    6
6     3   to the left of   17
7     3   to the left of   15
8     3   to the left of   12
9     4   to the left of   18
10    4  to the right of    9
11    5   to the left of   14
12    6  to the right of    3
13    6  to the right of   18
14    8   to the left of   16
15    9   to the left of   18
16    9   to the left of   10
17    9   to the left of    4
18    9   to the left of    3
19   10  to the right of    9
20   10   to the left of   18
21   11  to the right of    3
22   12  to the right of    3
23   14  to the right of    5
24   15  to the right of    3
25   15   to the left of   16
26   15               on    0
27   15  to the right of   18
28   16               on    0
29   16  to the right of   15
30   16  to the right of    2
31   16  to the right of    8
32   17  to the right of   18
33   17  to the right of    3
34   18  to the right of   10
35   18   to the left of   15
36   18  to the right of    9
37   18  to the right of    4
38   18   to the left of    6
39   18   to the left of   17
40   18               on    2