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