What's covered by the snow?
The branch is covered by the snow.
    src        edge_attr  dst
0     0  to the right of    2
1     0  to the right of   13
2     0   to the left of   10
3     0  to the right of   14
4     1               on   17
5     2  to the right of   13
6     2   to the left of   10
7     2   to the left of    0
8     2  to the right of   15
9     2  to the right of   14
10    5   to the left of    8
11    5   to the left of    9
12    7          wearing   12
13    8  to the right of    5
14    9  to the right of    5
15   10  to the right of    0
16   10  to the right of    2
17   11               of    7
18   13         covering   15
19   13               on   14
20   13   to the left of    2
21   13   to the left of    0
22   14   to the left of    2
23   14   to the left of    0
24   15   to the left of    2
25   15       covered by   13
26   16               of    7