Where is the grass?
The grass is on the snow.
    src        edge_attr  dst
0     0               on    0
1     1   to the left of   10
2     1  to the right of    5
3     1  to the right of    4
4     1  to the right of    9
5     1  to the right of    7
6     2   to the left of    3
7     2  to the right of    6
8     3  to the right of   13
9     3  to the right of    8
10    3  to the right of   16
11    3  to the right of    6
12    3  to the right of    2
13    4   to the left of    1
14    4   to the left of    5
15    5   to the left of    1
16    5  to the right of    4
17    6   to the left of    3
18    6   to the left of    2
19    7   to the left of    1
20    7   to the left of   10
21    8   to the left of    3
22    9          wearing   16
23    9      in front of   15
24    9   to the left of    1
25    9   to the left of   10
26    9   to the left of   15
27    9               on   11
28   10  to the right of    1
29   10  to the right of    7
30   10  to the right of    9
31   12   to the left of   15
32   13               on    8
33   13   to the left of    3
34   14   to the left of   15
35   15           behind    9
36   15               on    0
37   15  to the right of   16
38   15  to the right of   14
39   15  to the right of   12
40   15  to the right of    9
41   16   to the left of   15
42   16   to the left of    3