What color is the grass the snow is on?
The grass is tan.
    src        edge_attr  dst
0     0  to the right of   15
1     0   to the left of   13
2     1   to the left of    2
3     1   to the left of   13
4     2  to the right of    1
5     2  to the right of    3
6     3   to the left of   13
7     3   to the left of    2
8     5   to the left of   16
9     5   to the left of    9
10    6   to the left of    7
11    7  to the right of    6
12    9  to the right of    5
13   11               on    6
14   12  to the right of   15
15   13  to the right of    0
16   13  to the right of    1
17   13  to the right of    3
18   15   to the left of   12
19   15   to the left of    0
20   16  to the right of    5
21   16               on    9