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