What is the snow on?
The snow is on the branches.
    src        edge_attr  dst
0     1  to the right of   11
1     2   to the left of    7
2     2  to the right of   13
3     3  to the right of   13
4     3   to the left of    7
5     3   to the left of    8
6     4   on the side of    3
7     4  to the right of   13
8     4   to the left of    7
9     5  to the right of   13
10    5   to the left of    7
11    6               on    1
12    7  to the right of    3
13    7  to the right of    2
14    7  to the right of   13
15    7  to the right of    4
16    7  to the right of    5
17    8  to the right of    3
18    9  to the right of   13
19   10               on   11
20   11   to the left of   15
21   11   to the left of    1
22   12  to the right of   14
23   13   to the left of    4
24   13   to the left of    7
25   13   to the left of    9
26   13   to the left of   14
27   13   to the left of    5
28   13   to the left of    3
29   13   to the left of    2
30   14   to the left of   12
31   14  to the right of   13
32   15  to the right of   11