What is covered by the snow?
The hill is covered by the snow.
    src        edge_attr  dst
0     0   to the left of    2
1     0   to the left of    1
2     1  to the right of   10
3     1   to the left of    5
4     1  to the right of    0
5     2   to the left of   11
6     2  to the right of   10
7     2  to the right of    0
8     2   to the left of    5
9     5           behind    6
10    5  to the right of   11
11    5  to the right of    2
12    5  to the right of    1
13    6          wearing    4
14    6          wearing    2
15    6      in front of    5
16    6          wearing    9
17    8       covered by   10
18   10         covering    8
19   10   to the left of    1
20   10   to the left of    2
21   11  to the right of    2
22   11   to the left of    5