Where is the snow?
The snow is on the ground.
    src        edge_attr  dst
0     0   to the left of   10
1     0   to the left of    9
2     0   to the left of    3
3     3  to the right of    0
4     4               in   10
5     4   to the left of   10
6     6               in    1
7     6  to the right of    7
8     7               in    1
9     7   to the left of    6
10    8               in    1
11    9  to the right of    0
12    9        on top of   10
13   10               on    2
14   10  to the right of    0
15   10  to the right of    4
16   10  to the right of   11
17   11   to the left of   10