What is on the trees?
The snow is on the trees.
    src        edge_attr  dst
0     1   to the left of    8
1     1           behind    5
2     1   to the left of    7
3     3   to the left of    7
4     3   to the left of    8
5     4               of    5
6     5               in   11
7     5      in front of    1
8     7               on    8
9     7  to the right of    3
10    7  to the right of    1
11    8       covered in    7
12    8  to the right of    3
13    8  to the right of    1