What is the snow on?
The snow is on the roof.
    src        edge_attr  dst
0     0  to the right of    2
1     0  to the right of   18
2     0  to the right of    8
3     0  to the right of   17
4     0  to the right of   10
..  ...              ...  ...
56   17   to the left of    0
57   18  to the right of    6
58   18   to the left of    1
59   18   to the left of    0
60   19  to the right of   14

[61 rows x 3 columns]